Science 9 review

A textbook is dropped from a second floor window and falls to the ground. What happens to the acceleration as the book falls to the ground

• the acceleration increases

• the acceleration decreases

• the acceleration remains constant

The acceleration due to gravity near the surface of Earth is equal to

• 9.8 m/s

• 9.8 kg x m/s

• 9.8 N

• 9.8 m/s²

In a normal environment, why does a bowling ball and feather hit the ground at different times when dropped from the same height?

• They don't; they hit the ground at the same time.
• One is more dense than the other.
• One is heavier than the other.
• Air resistance 

An object in free fall

• ignores air resistance.

• undergoes a downward acceleration.

• has an acceleration of -9.8 m/s².

• all of these.

Heavier objects free fall faster than lighter objects.

• True

• False

2. A freely falling object's motion is under the sole influence of ____.

• A. gravity

• B. air resistance

• C. gravity and air resistance

• D. applied forces such as a persons push or pull

Item P and Q has different mass.

P=2Kg

Q=1Kg

which statement are true when item P and Q in free fall

• velocity of P and Q are the same

• The acceleration of P and Q are the same

• The momentum are the same

• inertia of P and Q are the same

It is a term used to describe a moving object, and it is expressed as a product of mass and velocity

• Momentum

• Impulse

• BOTH

It is the product of force and time.

• Momentum

• Impulse

• BOTH

To which of the following does the momentum of an object depend?

• Mass and velocity

• Force and speed

• Velocity and acceleration

• Time and acceleration