Physical Motion Quiz: Trivia Questions On Motion

The unit m/s represents meters per second, which is a measure of speed. It indicates how many meters an object travels in one second. This unit is commonly used in physics and engineering to describe the velocity of an object or the rate at which it changes its position. The other options (s, kg, and hr) do not represent units of speed but rather represent units of time (seconds), mass (kilograms), and time (hours), respectively.

The cyclist accelerates from rest to 12 m/s in 4 seconds. To find the acceleration, we can use the equation: acceleration = (final velocity - initial velocity) / time. Plugging in the values, we get: acceleration = (12 m/s - 0 m/s) / 4 s = 3 m/s^2. Therefore, the correct answer is 3 m/s^2.

Velocity is a vector quantity that includes both magnitude and direction. Speed, on the other hand, is a scalar quantity that only includes magnitude. Therefore, the main difference between speed and velocity is that velocity includes direction.

The average speed of a student walking a distance of 150 meters in 30 seconds would be 5 meters/second. This can be calculated by dividing the total distance (150 meters) by the total time (30 seconds).

Speed is a scalar quantity that describes how fast something is going, regardless of its direction. On the other hand, velocity is a vector quantity that not only describes how fast something is going but also includes its direction. Therefore, speed and velocity are different in that velocity takes into account both speed and direction, whereas speed only considers the magnitude of the motion.

The speedometer of a car reads instantaneous speed, which means it shows the speed of the car at any given moment. It provides real-time information about how fast the car is currently moving. In contrast, average speed is calculated by dividing the total distance traveled by the total time taken, and it gives an overall measure of the car's speed over a period of time. However, the speedometer only displays the instantaneous speed, allowing the driver to know the current speed at any given moment.

When an object slows down, its acceleration is negative. This is because acceleration is defined as the rate of change of velocity, and velocity is a vector quantity that includes both magnitude and direction. When an object slows down, its velocity decreases, which means there is a negative change in velocity over time. Therefore, the acceleration is negative.

The average speed is calculated by dividing the total distance covered by the time taken. In this case, the total distance covered is 750 m and the time interval is 25 s. Therefore, the average speed is 750 m / 25 s = 30 m/s.

The correct equation for average speed is "Average speed = total distance ÷ total time." This equation calculates the average speed by dividing the total distance traveled by the total time taken.

Since both Roger and Natalie are traveling the same distance, the ratio of distance to time can be used to compare their velocities. Roger's velocity is calculated as 2 miles / 7.5 minutes = 0.2667 miles/minute. Natalie's velocity is calculated as 2 miles / 6.5 minutes = 0.3077 miles/minute. Therefore, Natalie's velocity is greater in magnitude than Roger's velocity.

An object with constant velocity means that its speed and direction are not changing. If the acceleration is zero, it means that there is no change in velocity over time. Therefore, the object is maintaining a constant velocity.

Speed is a scalar quantity that describes how fast an object is moving, regardless of its direction. On the other hand, velocity is a vector quantity that not only describes the speed of an object but also its direction of motion. Therefore, the correct answer is speed and velocity.

The correct answer is 30 m/s, South. Velocity is a measure of the rate at which an object changes its position. It includes both the speed and direction of an object's motion. In this case, the answer "30 m/s, South" indicates that the object is moving at a speed of 30 meters per second in the south direction.

Acceleration refers to the rate at which an object's velocity changes. It is a measure of how quickly an object speeds up, slows down, or changes direction. In other words, it quantifies the change in velocity over time. Therefore, acceleration is the appropriate term to describe how quickly an object's velocity changes.

Graph 1 represents the motion of an object whose speed is increasing because it shows a positive slope, indicating that the object is moving with a constantly increasing speed over time. The steeper the slope, the faster the speed is increasing. This graph is a clear representation of an object accelerating or gaining speed.

If a person is walking at a speed of 2 m/s for 12 seconds, we can calculate the distance traveled by multiplying the speed by the time. So, 2 m/s * 12 s = 24 m. Therefore, the person would travel a distance of 24 meters.

A car that goes around a curve at a constant speed is the correct answer. Even though the car's speed remains constant, it is still accelerating because acceleration is defined as any change in velocity, including changes in direction. In this case, the car is constantly changing its direction as it goes around the curve, which means it is experiencing acceleration.

The slope of a distance versus time graph represents the rate at which an object is moving, which is the definition of speed. The steeper the slope, the faster the object is moving, and the flatter the slope, the slower the object is moving. Therefore, the slope of a distance versus time graph is directly related to the speed of the object.

The graph shows a straight horizontal line, indicating that the object's position is not changing over time. Since the position is not changing, the object is not accelerating or decelerating, meaning it is maintaining a constant speed.

The correct answer is "metres per second squared" because acceleration is defined as the rate of change of velocity with respect to time. It measures how quickly an object's velocity is changing. The unit "metres per second squared" represents the change in velocity (in metres per second) per unit of time (in seconds), indicating the acceleration of an object. Therefore, it is the appropriate unit for measuring acceleration.

The car is changing direction because it is traveling around a roundabout. Acceleration is defined as any change in velocity, which includes changes in speed or direction. In this case, the car is not changing its speed, but it is changing its direction as it moves around the roundabout. Therefore, the car is accelerating.

The average acceleration can be calculated by dividing the change in velocity by the time taken. In this case, the change in velocity is 25 m/s (final velocity) - 0 m/s (initial velocity) = 25 m/s. The time taken is 8.0 s. Dividing the change in velocity by the time taken gives us 25 m/s / 8.0 s = 3.1 m/s2. Therefore, the correct answer is 3.1 m/s2.

Based on the graph, we can see that the object's position is changing at an increasing rate over time. This indicates that the object is accelerating, or in other words, it is speeding up.

Displacement refers to the change in position of an object. It is a vector quantity that takes into account both the magnitude and direction of the change in position. It is different from distance, which only considers the magnitude of the change. Displacement is often represented by an arrow pointing from the initial position to the final position of the object.

The velocity of an object is a vector quantity that includes both magnitude and direction. In this question, we are given the speed of the airplane (635 km/h) and its altitude (35,000 m), but we do not have any information about its direction. Therefore, without knowing the direction in which the airplane is flying, we cannot determine its velocity.

The slope of an object accelerating uniformly (at a constant rate) on an acceleration vs. time graph is straight and horizontal. This means that the acceleration remains constant over time. The graph would show a straight line parallel to the x-axis, indicating that the object is experiencing a constant acceleration and not changing its rate of acceleration.

The given options describe different movements with specific directions and distances. However, the option "28 miles from Los Angeles to Catalina Island" does not indicate velocity because it only provides the distance between two locations without any information about the direction or time taken to cover that distance. Velocity is a vector quantity that includes both speed and direction, and this option lacks the direction component.

Since the runner starts and finishes at the same point, his displacement is zero. Displacement refers to the change in position from the starting point to the final point, and in this case, there is no change as the runner returns to the starting point after completing seven laps. Therefore, the displacement is zero miles.

A car slows down as it approaches a red light and a car speeds up as the light turns green both describe situations in which the car is undergoing an acceleration. In both cases, the car's velocity is changing, either decreasing or increasing, which indicates acceleration. A car making a right-hand turn at a constant speed does not involve a change in velocity, so there is no acceleration in this situation. A car maintaining its speed as it travels down a straight road also does not involve a change in velocity, so there is no acceleration in this situation either.