Homework 3

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

• the velocity increases

• the velocity decreases

• the velocity remain constant

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

A baseball is thrown up into the air. What happens to the velocity as the ball rises in the air?

• the velocity increases

• the velocity decreases

• the velocity remains constant

Tags

NGSS.HS-PS2-1

NGSS.HS-PS2-4

A baseball is thrown up into the air. What happens to the acceleration as the ball rises in the air?

• the acceleration increases

• the acceleration decreases

• the acceleration remains constant

Tags

NGSS.MS-PS2-2

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

• the leaf
• the stone
• They would accelerate at the same rate.
• It is difficult to determine without more information.

A ball is thrown upwards and caught when it comes back down. In the absence of air resistance, the speed of the ball when caught would be 

• less than the speed it had when thrown upwards.
• more than the speed it had when thrown upwards.
• the same as the speed it had when thrown upwards.

Tags

NGSS.MS-PS2-2

NGSS.MS-PS2-4

NGSS.MS-PS3-1

NGSS.MS-PS3-5

Where would you have more mass, on Earth or on the Moon?

• Earth
• Moon
• IS THE SAME, mass DOESN'T CHANGE
• In both Planets.

When an object falls in physics world, what happens?

• It accelerates at a constant rate until it hits the ground
• It accelerates at a non-constant rate until it hits the ground
• It accelerates at a constant rate until it reaches terminal velocity
• It accelerates at a non-constant rate until it reaches terminal velocity

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 

In Newtonian physics, ________________ is any motion of a body where gravity is the only force acting upon it.

• kinematics

• free fall

• mechanics

• velocity

Tags

NGSS.MS-PS2-2