PS Midterm Review

The rate of change in velocity; how quickly velocity is changing

• speed

• velocity

• resultant speed

• acceleration

The unit for acceleration is

• m²/s

• m/s

• m/s²

• m/s³

For acceleration, what quantity tells the direction of an object?

• distance

• time

• velocity

If velocity and acceleration are in the same direction an objects ____________.

• speeds up

• slows done

• stops

• turns

If velocity and acceleration are in the opposite direction, the object _________.

• stops

• none

• slows down

• speeds up

Acceleration due to gravity is 9.0 m/s²

• True

• False

In which of the following conditions does the car not accelerate?

• A car moves at 80 km/h on a flat, straight highway

• the car slows down from 80 km/h to 35 km/h

• the car turns acorner

• the car speeds up from 35 km/h to 80 km/h

The momentum of an object depends on the object's __________ and  ____________.

• size and shape
• mass and energy
• mass and speed
• mass and velocity

The equation to calculate momentum is

• p=mv
• p=1/2mv^2
• p=mgh
• p=mg

In any collision, the ____________ is always conserved.

• total momentum

• total speed

• total velocity

• energy