Vertical Motion Under Gravity

When can you use SUVAT equations?

• Any time you want to find speed, displacement, time, velocity or acceleration

• When acceleration is constant

• When acceleration is variable

• Any time when you are treating an object as a particle

Which of the following are properties of vertical projection from ground level?

(Mark all that apply)

• Velocity at the maximum height is 0

• The journey to the maximum height takes the same time as the return from the maximum height

• The speed of the object hitting the ground is the same as the initial speed

• The total time to return to the ground is twice the time to the highest point

In this quiz, do not enter units for any of the answers!

A particle is dropped, what is the value of u?

In this quiz, do not enter units for any of the answers!

A particle is thrown upwards, what is it's velocity at its greatest height?

A ball is thrown downward from the top of a roof with a speed of 25 m/s. After 2 s, its velocity will be 

• 19.6 m/s
• -5.4 m/s
• -44.6 m/s
• 44.6 m/s

A girl dropped a stone into an empty well. She heard the sound of the stone hitting the bottom of the well after 4 seconds.

The depth of the well is about

• 20 m

• 40 m

• 80 m

• 160 m

A freely falling object on Earth has a speed of 5.0 m s^-1. After falling a further 20 m, its speed it

• 15 m s^-1

• 20 m s^-1

• 25 m s^-1

• 45 m s^-1

A ball is dropped from rest from a building 35.0 m high. If air resistance is neglected, then the ball will hit the ground with a speed of

• 8.4 m s^-1

• 13.1 m s^-1

• 18.5 m s^-1

• 26.2 m s^-1

READ CAREFULLY!

An object is dropped from a cliff. How far does the object fall in the third second? Assume that g = 10 m s^-2

• 20 m

• 25 m

• 35 m

• 45 m