Kinematics Revision 3-3

In the absence of air resistance, objects fall at constant 

• speed
• velocity
• acceleration
• all of the above

At 60 seconds, how far has this object traveled? 

• 0 m
• 10 m
• 20 m
• 40 m

Describe the motion of the particle.

This is the x-tgraph of the motion of a particle. Of the four points P, Q, R,and S, the speed is greatest at

• P

• Q

• R

• S

This is the x-tgraph of the motion of a particle. Of the four points P, Q, R,and S, the acceleration ax is greatest (most positive) at

• P

• Q

• R

• S

This is a motion diagram of an object moving along the x-direction with constant acceleration. The dots 1, 2, 3, … show the position of the object at equal time intervals ∆t. Which of the following vx-tgraphs best matches the motion shown in the motion diagram?

• 
• 
• 
• 
• 

A bicycle moves off from its original position at a constant speed of 4m/s for 5s. It then decelerates to a stop in 1s.

The cyclist accelerates at a constant rate of 2m/s^2 over 4s in the opposite direction before it comes to a sudden stop.

Draw a velocity-time graph that describes the bicycle's motion.

A bean bag is thrown up into the air with an initial velocity 3 m/s. How long does it take the bean bag to return to its original position?

• 0.3 seconds

• 0.61 seconds

• 1.2 seconds

• 3.26 seconds