Gravity Kinetic Energy

Two balls that look exactly the same but have different masses are dropped at the same time from the top of the ladder. Which ball will hit the ground first?

• The ball with more mass will hit the ground first.

• The ball with less mass will hit the ground first.

• both balls will hit the ground at the same time.

• More information is needed to determine which ball has more kinetic energy.

Tags

NGSS.MS-PS2-4

Two students made a video recording of a basketball as it was dropped. They recorded the time and position of the basketball at each frame.. They made this data table based on the first eight frames of the recording. In 8 frames, the basketball traveled 20.4 cm. Use the data table to complete the sentence. Student A says she wants to remove the first and last acceleration values because it is always OK to exclude outliers (data that doesn't seem to fit). Fill in the blank to respond to this student. It is not always okay to exclude data that doesn't seem to fit, but in this case it is appropriate because the first value comes from distances that are so small that they could be _________.

Two pieces of paper that are the same size and mass are dropped at the same time from the top of the ladder. One is flat and the other crumpled into a ball.Fill in the blank to explain why the crumpled paper will hit the ground first. The crumpled paper will hit the ground faster because there is less _______ resistance from the surface slowing its motion.

Two balls that look exactly the same but have different masses are dropped at the same time from the top of the ladder. Which ball will hit the ground first?

• The ball with less mass will hit the ground first.

• The ball with more mass will hit the ground first.

• More information is needed to determine which ball has more kinetic energy.

• Both balls will hit the ground at the same time.

Tags

NGSS.MS-PS2-4

Two pieces of paper that are the same size an mass are dropped at the same time from the top of the ladder. One is flat and the other crumpled into a ball. Which piece of paper will hit the ground first?

• The smooth, flat piece of paper will hit the ground first.

• More information is needed to determine which ball will hit the ground first.

• The crumpled ball of paper will hit the ground first.

• Both pieces of paper will hit the ground at the same time.

Tags

NGSS.MS-PS2-2

True of False: Two balls that look exactly the same but have different masses should fall at the same rate even if they're different in mass because the acceleration of gravity is constant.

• True

• False

Tags

NGSS.MS-PS2-4

What is the primary force that causes an object to fall towards the Earth?

• Electromagnetic force

• Nuclear force

• Gravity

• Friction

Tags

NGSS.MS-PS2-4

Which of the following best describes kinetic energy?

• Energy stored in an object due to its position

• Energy an object possesses due to its motion

• Energy released during a chemical reaction

• Energy stored in atomic nuclei

Tags

NGSS.MS-PS3-1

If a ball is thrown upwards, what happens to its kinetic energy as it reaches the highest point?

• It increases

• It decreases to zero

• It remains constant

• It doubles

Tags

NGSS.MS-PS3-1

NGSS.MS-PS3-5

A car is moving at a constant speed on a flat road. What happens to its kinetic energy if its speed doubles?

• It remains the same

• It doubles

• It triples

• It quadruples

Tags

NGSS.MS-PS3-1

NGSS.MS-PS3-5