Hchs IPC Test #2 Motion

The graph does not show a constant speed or constant velocity because the position of the object is changing at an increasing rate. This indicates that the object is accelerating.

Based on the information provided in the data table, the correct answer is Alonzo. This implies that Alonzo is the only runner who stops briefly, while Sally does not stop briefly.

The SI unit for measuring time is seconds. This is because seconds are a standard unit of measurement for time in the International System of Units (SI). It is defined as the duration of 9,192,631,770 periods of the radiation corresponding to the transition between the two hyperfine levels of the ground state of the cesium-133 atom.

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Speed is a measure of how quickly an object moves over a certain distance in a given amount of time. Therefore, speed is described in units of distance and time. The distance is typically measured in meters or kilometers, while the time is measured in seconds or hours.

Based on the speed-time graph, the acceleration of the body during the first second can be determined by calculating the change in velocity over the change in time. In this case, the change in velocity is 10 m/s (from 0 m/s to 10 m/s) and the change in time is 2 seconds (from 0 seconds to 2 seconds). Therefore, the acceleration is 10 m/s divided by 2 seconds, which equals 5 m/s squared.

When you look at a speedometer in a moving car, you can see the car's instantaneous speed. The speedometer provides the current speed of the car at any given moment. It gives a real-time measurement of the car's velocity, which is the rate at which the car is changing its position. The instantaneous speed is different from average speed, which is the total distance traveled divided by the total time taken. Similarly, instantaneous acceleration refers to the rate at which the car's velocity is changing at a specific point in time.

A frame of reference is a system of objects that are not moving with respect to one another. It provides a stationary point from which motion can be observed and measured. By using a frame of reference, we can determine the position, velocity, and acceleration of objects in motion relative to the chosen reference point. This allows us to analyze and describe the motion of objects accurately.

The correct answer is average speed because it represents the total distance traveled divided by the total time taken. In this case, jogging for 1 hour and traveling 10 km gives an average speed of 10 km/h. Velocity refers to the speed in a given direction, displacement is the change in position, and acceleration is the rate of change of velocity.

When you divide the total distance traveled by the total time, you calculate the average speed. Average speed is a measure of how fast an object is moving on average over a given period of time. It is calculated by dividing the total distance traveled by the total time taken. This calculation provides an overall representation of the object's speed throughout the entire journey, regardless of any variations in speed that may have occurred during different parts of the trip.

Acceleration is defined as the change in velocity divided by the time. This means that acceleration measures how quickly an object's velocity changes over a specific period of time. It is calculated by taking the difference between the final and initial velocities and dividing it by the time it takes for the change to occur. Acceleration can be positive or negative, indicating whether an object is speeding up or slowing down. It is a fundamental concept in physics and is often used to analyze the motion of objects.

When a ball is just dropped, it falls freely under the influence of gravity. This means that it is not being affected by any other forces, such as air resistance. The ball's motion is solely determined by the acceleration due to gravity, causing it to fall at a constant rate. Therefore, the correct answer is "free fall with gravity."

When two displacement vectors are in the same direction, their magnitudes can be added to find the resultant displacement. In this case, the displacement vectors are 3 m and 5 m. Adding these two magnitudes, we get 3 + 5 = 8 m. Therefore, the displacement vector that is formed by combining these two vectors is 8 m.

Velocity is the correct answer because it refers to the speed of an object in a specific direction. Unlike speed, which only measures how fast an object is moving, velocity takes into account both the magnitude and direction of the object's motion. Therefore, velocity is the appropriate term to describe speed in a certain direction.

The slope of a speed-time graph represents the rate of change of speed over time. In other words, it shows how quickly the speed is changing. Acceleration is defined as the rate of change of velocity over time, and since velocity is the rate of change of displacement over time, the slope of a speed-time graph can be considered as the acceleration. Therefore, the correct answer is acceleration.

Based on the information provided, the correct answer is ball B. This can be determined by looking at the speed-time graph, where the line representing ball B is flat and does not show any change in speed over time. This indicates that ball B is not moving and is sitting still.

The part of the graph showing that the object has reversed its direction of motion is DE. This is because DE represents a change in the direction of the object's motion. Before point D, the object is moving in the positive direction, and after point E, it is moving in the negative direction. Therefore, DE indicates a reversal in the object's motion.

The woman walking at a constant speed of 2.5 m/s along a straight line is not accelerating. Acceleration is defined as a change in velocity, either in magnitude or direction. Since the woman's speed and direction remain constant, there is no change in velocity and therefore no acceleration.

Displacement is a vector quantity that not only includes the distance traveled but also the direction in which an object has moved. In other words, it describes the change in position from the initial point to the final point, taking into account both the magnitude and the direction of the movement. Therefore, the correct answer is "direction".

The proper SI unit for acceleration is m/s squared because acceleration is defined as the rate of change of velocity with time, and velocity is measured in meters per second (m/s). The squared term indicates that the unit is divided by time squared, representing the change in velocity over a specific time interval. Therefore, m/s squared is the correct unit for measuring acceleration in the International System of Units (SI).

The correct SI unit of speed is meters per second (m/s). Speed is defined as the distance traveled per unit of time, and the SI unit for distance is meters (m) and for time is seconds (s). Therefore, combining these units gives us meters per second (m/s) as the correct SI unit for speed.

The given answer states that the distance traveled is zero meters. This means that the sea gull has not moved from its starting position at the end of the time interval. Since the average speed is 0 m/s, it indicates that the sea gull did not change its position during the given time interval.

Displacement refers to the change in position of an object from its initial point to its final point, taking into account both the distance and direction. In this case, "19 km, South" is a displacement because it specifies a distance of 19 km in the south direction, indicating a change in position from the initial point to the final point. The other options do not provide information about a change in position or direction, making them not displacements.

The speed of the object was zero on the part of the graph labeled BC because the distance covered during that time interval was constant, indicating that the object was not moving. This is supported by the fact that the slope of the graph is horizontal, indicating no change in distance over time. Therefore, the object was stationary during the BC portion of the graph.

The man's relative motion to someone watching the train go by would be the sum of his velocity and the velocity of the train. Since the man is moving at 2 m/s and the train is moving at 90 m/s, their velocities would add up to give a relative motion of 92 m/s.

The speed of a flight attendant walking down the aisle of a moving plane is NOT the same in relation to a person on the ground because the plane is moving forward while the flight attendant is also moving forward. Therefore, the flight attendant's speed in relation to a person on the ground would be the sum of their individual speeds.

The correct answer is "direction is always changing." A Ferris wheel moving at a constant speed is still accelerating because acceleration refers to any change in velocity, including changes in direction. Even though the speed may remain constant, the Ferris wheel is constantly changing its direction as it rotates, which means it is experiencing acceleration.

The SI unit for distance is the meter. The meter is the fundamental unit of length in the International System of Units (SI). It is defined as the length of the path traveled by light in a vacuum during a specific time interval. The meter is commonly used to measure distances on Earth and is a standard unit in various fields such as physics, engineering, and everyday measurements.

The given options represent different units of speed: km/s, m/s, cm/s, and mm/s. To compare them, we need to convert them to the same unit. Since 1 km = 1000 m and 1 m = 100 cm, we can convert 0.2 km/s to m/s by multiplying it by 1000, resulting in 200 m/s. Therefore, the greatest speed among the options is 200 m/s.

After driving 3 km east and 1 km north, the magnitude of the distance and displacement are not the same. The distance traveled is the sum of the individual distances traveled in each direction, which is 3 km + 1 km = 4 km. However, the displacement is the straight-line distance from the starting point to the final point, which can be found using Pythagoras' theorem as sqrt((3 km)^2 + (1 km)^2) = sqrt(10) km. Therefore, the magnitude of the distance and displacement are different in this case.

Based on the distance-time and speed-time graphs, we can determine acceleration by looking for a change in velocity over time. In the case of ball A, the speed-time graph shows a positive slope, indicating that the velocity is increasing. This means that ball A is accelerating. However, without further information about the other balls or the specific characteristics of the graphs, we cannot determine if any of the other balls are accelerating.

Constant speed on a speed-time graph is represented by a horizontal line above zero. This means that the object is moving at a consistent speed without any changes in its velocity. A horizontal line indicates that the speed of the object remains constant over time, while being above zero indicates that the object is moving forward or in a positive direction.

The man initially drives 3 km east from home to the store, so he is 3 km away from home. Then, he drives 2 km west to his friend's house, which means he moves 2 km in the opposite direction. Therefore, the man's total displacement from the starting point is 3 km - 2 km = 1 km east. Thus, his distance from the starting point, at home, is 1 km.