Physics Unit 3 practice test

Acceleration

Now the Ford Mustang changes it velocity by speeding up to 70 kph in one second. it is still traveling towards the northwest. The Mustang has begun __.

elastic

On a street, the Ford Mustang traveling at 60 kph collides head on with an SUV going 27 kph in the opposite direction. The two vehicles bounce off each other and move away in opposite directions. Their collision is __.

Vector

Since the Ford Mustang's velocity, acceleration, and momentum all involve direction, these quantities are __.

net

The Ford Mustang and the SUV involved in the accident both had a momentum prior to the collision. After the collision, the __ momentum is vector sum of the momentum of the two vehicles.

7 kph/s

The Ford Mustang's acceleration might be expressed as __.

v=d/t

The Ford Mustang's velocity was computed by using the formula __ and including the direction the car was traveling in.

work

The amount of force needed to move the tire 5 miles is equal to the __ required to perform that task.

power

The amount of work done to move the tire 5 miles in 5 minutes is equal to the __ necessary to perform that task.

p=mv

To calculate the Ford Mustang's momentum, you would use the formula __.

d=1/2gt^2

To calculate the time it would take for a ball to fall from the third floor to the street, you would use the formula __.

F=Gm1m2/r^2

To compute the force of gravity, you would use the formula __.

circumference

A points to the object's __.

circular

A sticky note became attached to the tire. As the tire rotates, the sticky note travels in nonlinear, or __ motion.

Gravity

If the Ford Mustang accidentally went off the third floor of a parking garage, it would accelerate towards the street due to the force of __.

Momentum

If the Ford Mustang were to veer off the road and hit a sign, it would do much damage because its mass of 1533.142 kg times its velocity of 110 kph means it has high __.

an impulse

If the momentum of the Ford Mustang changed, it would be due to __.

m1v1+m2v2=m1v1'+m2v2'

If they knew the Mini Cooper's mass, the formula that would help you determine the Ford Mustang's velocity would be __.

Inelastic

In a parking lot, the Ford Mustang bumps into a Mini Cooper traveling in the same direction. Their fenders lock together and for a short time, they travel together. Their collision is __.

Radius

B points to the object's__.

Tangent

C is the __ line the sticky note would follow if it became unattached during the tire's rotation.

Inertial Path

Centripetal force pulls a mass out of its __.

centripetal force

D represents the __ that makes the sticky note try to move inwards to the tire's axis.

Gravity

The centripetal force that keeps you on the face of the earth is __.

hollow

The formula for rotational inertia is __.

centripetal acceleration

The rate of the tire's speed suddenly increases. The sticky note's speed also increases. Another way of saying this is that the sticky note's __ increases.

rotational

The speed at which the sticky note follows the circumference in rotation around the tire's axis is the sticky note's __ speed.

tangential speed

The speed with which the sticky note would have if it became unattached during the tire's rotation is the sticky note's.

velocity

The statement "A Ford Mustang is moving at 63 mph northwest" describes the Mustang's __.

rotational inertia

The tire and the axle it is attached to tend to remain in rotation due to __.

I=md^2

__. That is why you need brakes on a car-to stop the tires' rotating motion.