Acceleration

What are the three ways an object can accelerate?

• Speed up, slow down or change direction

• Go forward, go backward or stop

• Turn left, turn right or go straight

• distance, displacement or speed

Accelation is

• the change in velocity with time

• the change in displacement with time

• the change in distance with time

• just speeding up

A fighter jet goes from +100 m/s to + 230 m/s in a time of 10 s. What was its acceleration?

• -10 m/s²

• +33 m/s²

• -23 m/s²

• +13 m/s²

A car goes from -100 m/s to + 230 m/s in a time of 20 s. What was its acceleration?

• -10 m/s²

• +16.5 m/s²

• -23 m/s²

• +13 m/s²

Flash goes from -150 m/s to +150 m/s in a time of 20 s. What was its acceleration?

• -10 m/s²

• +16.5 m/s²

• -23 m/s²

• +15 m/s²

An asteroid goes from +25 m/s to -350 m/s in a time of 40 s. What was its acceleration?

• -8.13 m/s²

• +16.5 m/s²

• -23 m/s²

• +15 m/s²

A bike starts from rest (0 m/s) with an acceleration of +2m/s². What will its velocity be after 5s?

• +2 m/s

• -10 m/s

• + 10 m/s

• -4 m/s

A skateboard starts from rest (0 m/s) and accelerates at -2m/s². What will its velocity be after 6s?

• +8 m/s

• -12 m/s

• + 12 m/s

• -4 m/s

An helicopter goes from +15 m/s to -45 m/s in a time of 25 s. What was its acceleration?

• -12.78 m/s²

• +16.5 m/s²

• -2.4 m/s²

• +15 m/s²

An boulder goes from -15 m/s to -145 m/s in a time of 25 s. What was its acceleration?

• -5.2 m/s²

• +16.5 m/s²

• -2.4 m/s²

• +15 m/s²