Quiz Review

This form of motion can only occur in outer space or in a vacuum. It is solely dependent on the force of gravity.

• Free Fall Motion

• Projectile Motion

• Centripetal Motion

• Gravitational Motion

Which form of motion always follows a curved path and requires an initial launch force that is greater than the force of gravity?

• Centripetal Motion

• Free Fall Motion

• Projectile Motion

• Gravitational Motion

Why does a bowling ball and feather hit the ground at slightly different times when dropped from the same height?

• They don't; they hit the ground at the same time.

• One is heavier than the other.

• One is denser than the other.

• Air resistance

At the instant a ball is thrown horizontally with a large force, an identical ball is dropped from the same height. Which ball hits the ground first? 

• Neither- they hit at the same time

• The horizontally thrown ball

• The identical ball

• None of these

Which would fall with greater acceleration in a vacuum—a leaf or a stone?

• They would accelerate at the same rate.

• The Stone

• The Leaf

• It is difficult to determine without more information.

Aristotle explained that the object moves depending on the natural motion of the dominant element of that object. Which among the following element-motion pairs is CORRECTLY matched?

• Earth - Circular

• Water - Fall

• Fire - Fall

• Celestial - Retrograde

 How does friction affect speed?

• More friction decreases speed

• Less friction decreases speed

• More friction increases speed

• Less friction doesn't affect speed

A type of friction that occurs when air pushes against a moving object causing it to decelerate.

• Surface Area

• Velocity

• Air Resistance

• Gravity 

Which of the following agrees with Galileo's view of motion?

• A feather will be as fast as an iron ball if dropped in a vacuum.

•  If a 10-kg boulder is dropped to the sea, it will stop midway.

• Planets revolve around the Sun because of a Prime Mover.

• Smoke rises because the sky is its natural place.

A box sliding on the floor slowly stops. Why is this so?

• There was a force that impeded the sliding box.

• The applied force from the pusher disappeared.

• The resistive force from the floor is equal to the applied force.

• The resistive force from the floor is equal to the applied force.