1.
The difference between velocity and speed is that .....
Correct Answer
A. Speed is a scalar, velocity is a vector
Explanation
The correct answer is that speed is a scalar, velocity is a vector. This means that speed only has magnitude, while velocity has both magnitude and direction. Speed measures how fast an object is moving, while velocity not only measures the speed but also specifies the direction in which the object is moving. Therefore, speed can be represented by a single value, while velocity requires both magnitude and direction to be fully described.
2.
A vector quantity differs from a scalar in that a vector always includes..
Correct Answer
C. Magnitude and direction
Explanation
A vector quantity differs from a scalar in that a vector always includes magnitude and direction. Scalars only have magnitude, which refers to the size or quantity of the quantity being measured. However, vectors have both magnitude and direction, which means they not only tell us how much of something there is but also in which direction it is going. This distinction is important in physics and other scientific fields where understanding both the quantity and its direction is necessary for accurate analysis and calculations.
3.
A cyclist travels 125km in 5hours. How fast is the cyclist moving?
Correct Answer
B. 25km/h
Explanation
The cyclist is traveling at a speed of 25km/h because the distance traveled (125km) divided by the time taken (5 hours) equals 25.
4.
A plane travels at 600km/h. How far will it travel in 3hr 15min?
Correct Answer
C. 1950km
Explanation
The plane travels at a speed of 600km/h. To find the distance it will travel in 3 hours and 15 minutes, we need to convert the minutes into hours. 15 minutes is equal to 15/60 = 0.25 hours. Therefore, the total time is 3.25 hours. To find the distance, we multiply the speed (600km/h) by the time (3.25 hours): 600km/h * 3.25 hours = 1950km. Therefore, the plane will travel a distance of 1950km in 3 hours and 15 minutes.
5.
A snail is crawling for 45s at a speed of 0.1cm/s. How far does it travel?
Correct Answer
C. 4.5cm
Explanation
The snail crawls for 45 seconds at a speed of 0.1 cm/s. To find the distance traveled, we multiply the speed by the time: 0.1 cm/s * 45 s = 4.5 cm. Therefore, the snail travels a distance of 4.5 cm.
6.
The journey from Winnipeg to Austin is 200km. If the train travels at 100km/h, how long will journey take?
Correct Answer
D. 2.0 hrs
Explanation
The journey from Winnipeg to Austin is 200km. If the train travels at 100km/h, it will cover 200km in 2 hours.
7.
A sprinter runs the 200m at 8.6m/s. How long does she take to complete the race?
Correct Answer
A. 23.3s
Explanation
The sprinter runs the 200m at a speed of 8.6m/s. To find the time taken to complete the race, we divide the distance by the speed. So, 200m divided by 8.6m/s equals approximately 23.3 seconds.
8.
An upward, straight sloping line (left to right) on a distance time graph means:-
Correct Answer
B. Constant Speed
Explanation
An upward, straight sloping line on a distance-time graph indicates constant speed. This means that the object is covering the same amount of distance in equal intervals of time. The slope of the line represents the speed, and since the line is straight, it means that the speed is consistent and not changing.
9.
A flat, non-sloping line on a distance time graph means:-
Correct Answer
A. No Speed
Explanation
A flat, non-sloping line on a distance-time graph indicates that the object is not changing its position over time. This means that there is no movement or speed involved. The object is at rest and not moving in any direction.
10.
On a distance time graph if Line A has a steeper slope than Line B, then Object A has a__________ than Object B:-
Correct Answer
B. Greater Speed
Explanation
If Line A has a steeper slope than Line B on a distance-time graph, it means that Object A covers a greater distance in the same amount of time compared to Object B. This indicates that Object A is moving at a greater speed than Object B.
11.
A curved line which is getting steeper on a Distance-Time graph represents:-
Correct Answer
C. Acceleration
Explanation
A curved line getting steeper on a Distance-Time graph represents acceleration. This is because acceleration is the rate at which an object's velocity changes. When the line on the graph becomes steeper, it means that the object is covering more distance in a shorter amount of time, indicating an increase in velocity. Therefore, the object is accelerating.
12.
A flat, non-sloped line on a Velocity-Time graph represents
Correct Answer
A. Constant Speed
Explanation
A flat, non-sloped line on a Velocity-Time graph represents constant speed because the velocity of an object remains the same over time. This means that the object is moving at a consistent rate without any changes in its speed. The flat line indicates that there is no acceleration, as acceleration would cause a change in velocity over time. Therefore, the object is neither speeding up nor slowing down, but maintaining a steady speed throughout the given time period.