Kinematic Variable Relationships

Which variables have a linear relationship with each other? CHOOSE 2 ANSWERS!

• final velocity and time

• initial velocity and time
  

• final velocity and displacement
  

• displacement and time

Which variables have a square relationship with each other? CHOOSE 2 ANSWERS!

• final velocity and time

• initial velocity and time
  

• final velocity and displacement
  

• displacement and time

A ball which is dropped from rest at the top of a building. The ball strikes the ground with a speed of 30 m/s. Assume air resistance can be ignored. This ball is now taken to the top of a different building and dropped from rest again. If the strikes the ground with a speed of double the original amount for this trial, what change might have occurred to the time of flight, t?

• t

• 1/2t

• 2t

• 1/4t

Starting from rest, object 1 falls freely for 4.0 seconds, and object 2 falls freely for twice as long. Compared to object 1, object 2's height is:

• half as far.

• twice as far.

• three times as far.

• four times as far.

A small car when braking has a constant acceleration. If the car is initially going 20 m/s and must press on the brake 10 meters from the stop sign, how far from the stop sign must the car press on the brake if the car was initially going 3 times greater than the original velocity?

• one third as far.

• three times as far.

• equally as far.

• nine times as far.