v ^2 =u ^2 +2as

A cyclist travelling at a speed of 4.2 m s^-1 accelerates at 1.1 m s^-2. In a time of 7.4 s, the distance travelled is

• 30 m

• 35 m

• 61 m

• 91 m

The third equation of linear motion is

• v=u + at

• s= ut + ¹/₂at²

• v²=u² + 2as

Which of these SUVAT equations is correct?

• v² = u² - 2as

• s = (u + v)t

• s = vt + ¹/₂at²

• v = (u² + 2as)^0.5

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 student is asked to solve the following problem:

An object is thrown upwards with a speed of 25 m s^-1. How high will it be when the speed is 12 m s^-1 ?

Which equation will allow the problem to be solved in a SINGLE calculation?

What is the acceleration of a ball that is dropped off the side of a cliff after 1,2,3,4,5 seconds? (assume g is rounded to 10 m/s²)

• 5,10,15, 20, 25 m/s²
• 10, 20, 30, 40, 50 m/s²
• 5, 20, 45, 80, 125 m/s²
• 10,10,10,10,10 m/s²

If you throw a baseball straight up, what is its velocity at the highest point?

• 9.8 m/s²
• 9.8 m/s
• 0 m/s²
• 0 m/s

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

A lunar landing module is descending to the Moon’s surface at a steady velocity of 10.0 m s^-1. At a height of 120 m a small object falls from its landing gear. Assuming that the Moon’s gravitational acceleration is 1.60 m s^-2, at what speed, in m s^-1 does the object strike the Moon?

• 22.0

• 19.6

• 16.8

• 10.0

ANOTHER ONE TO MAKE YOU THINK PRACTICALLY:

The winner of a 400 m race must have the greatest

• acceleration.

• average speed.

• instantaneous speed.

• maximum speed.