1D Motion
If an object has a constant velocity, what can be said about its acceleration?
The acceleration is zero
A 10kg box is moving across the floor with a constant speed. Which statement explains the mistake of this FBD?
Ff and Fa should be in the same friction
Which of the following measurements is NOT a Scalar?
Displacement
What is the SI unit for acceleration?
m/s^2
If the car of 75kg is traveling around a curve of radius of 50m at a velocity of 15 m/s, what is the centripetal force of the car?
337N
Displacement is a vector quantity because it includes information about:
Magnitude and direction
If the car is traveling around a curve of 50m radius at a velocity of 10 m/s, what is the centripetal acceleration of the car?
2 m/s/s
What is the average acceleration of an object that changes its velocity from 10 m/s to 30 m/s in 5 seconds?
6 m/s^2
A child riding a merry-go-round feels a centripetal force. How would the magnitude of the acceleration change if the velocity doubled (2x)?
quadrupled (4x)
Which of the following best defines distance?
The total amount of ground covered by an object
A ball was spinning around on a string of a certain radius at a constant speed. Then it went around the same curve at half of the original speed. Which of the following correctly identifies the new force acting on the ball?
The new force exerted on the ball towards the center of the curve was four times as much as before.