Free Fall

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

A baseball is thrown up into the air. What direction is the acceleration of the ball?

• upward

• downward

Tags

NGSS.MS-PS2-2

NGSS.MS-PS2-4

A textbook is dropped from a second floor window and falls to the ground. What direction is the velocity?

• upward

• downward

Tags

NGSS.MS-PS2-2

NGSS.MS-PS2-4

A textbook is dropped from a second floor window and falls to the ground. What direction is the acceleration?

• upward

• downward

What is the velocity of a ball that has been dropped off a cliff after 1 , 2, 3, 4, and 5 seconds? (concept development page 4). 

• 10, 20, 30, 40, 50 m/s
• 5, 10, 15, 20, 25 m/s
• 5, 20, 45, 80,125 m
• 10,10,10,10,10 m/s

What is the acceleration of a ball that is dropped off the side of a cliff after 1,2,3,4,5 seconds?

• 5,10,15, 20, 25 m/s²

• 10, 20, 30, 40, 50 m/s²

• 5, 20, 45, 80, 125 m/s²

• 9.8, 9,8,9.8, 9.8, 9.8 m/s²

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.

If you throw a baseball straight up, what is its velocity at the highest point?

• 9.8 m/s²
• 9.8 m/s
• 0 m/s²
• 0 m/s

Tags

NGSS.MS-PS2-4

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