SCALAR/VECTOR
Vector quantities have a direction and a…
MAGNITUDE
A train covers 300 m in 20 s. Calculate the average speed.
15 m/s
A horizontal line on a distance-time graph shows that the object is...
stationary or not moving.
A car increases its speed from 0 m/s to 10 m/s in 5 s. What is its acceleration?
2 m/s²
What is a measure of the amount of matter an object contains.
mass
Speed is an example of a _____ quantity, while displacement is an example of a _____ quantity.
scalar and vector
A car drives 120 km north in 2 hours, then 80 km south in 1 hour. What is the magnitude of its average velocity?
13 km/h
The slope of a distance-time graph represent
speed
A train slows down from 20 m/s to 10 m/s in 5 s. What is the deceleration?
2 m/s²
State the word equation to calculate the weight of an object?
weight = mass × gravitational field strength
A car travels 50 km north and then 30 km south. What are the distance and displacement?
80 km and 20 km north
A runner completes a 400 m circular track in 50 s. Calculate the average speed and average velocity.
8 m/s (speed) and 0 m/s (velocity)
The area under a speed-time graph represents
distance
A bike accelerates uniformly from 3 m/s to 15 m/s in 4 s. Calculate the acceleration.
3 m/s²
A 50 kg astronaut is on Earth where g=10 N/kg. What is their mass on a planet where g=5 N/kg?
50 kg
A plane flies 300 km east and then 400 km north. What is the magnitude of its displacement?
500 km
A plane flies 60 km north in 1 hour and 80 km east in 2 hours. What is the magnitude of its average velocity?
33 km/h
A distance–time graph curve that gets steeper over time indicates that the object is...
accelerating or increasing speed.
A car accelerates uniformly from 10 m/s to 30 m/s at 4 m/s². How long does it take to reach 30 m/s?
5 s
A 50 kg astronaut is on the Moon (g = 1.6 N/kg). Calculate their weight.
80 N
An object moves in a circle at constant speed. Explain why its velocity is changing.
The direction of motion changes, so the velocity vector changes
A cyclist travels 30 km north in 0.5 hours, then 40 km east in 1 hour, and finally 10 km south in 0.25 hours. Calculate the magnitude of the average velocity for the whole journey.
Displacement=(40)2+(20)2=1600+400
root of 2000≈44.7 km
Total time=0.5+1+0.25=1.75 h
What is 25.5 km/h
A velocity–time graph shows a horizontal line at 6 m/s for 2 s, followed by a straight line sloping down to 0 m/s over the next 2 s. Calculate the total displacement.
Total displacement=12+(0.5)(12)=18 m
A car accelerates at 3 m/s² for 6 seconds and reaches a speed of 21 m/s. What was its speed at the start?
3 m/s
A car moving at 25 m/s comes to rest after 100 m under uniform deceleration.
Calculate the time taken to stop.
8.0 s