Objects Collide

During a baseball game, a hitter strikes the ball with a bat. When this happens, the ball and the bat exert a force on each other. Why does the ball accelerate away from the bat more than the bat accelerates away from the ball?

• The ball has less mass, so it exerts less force on the bat.

• The ball has greater velocity before the collision, so the force affects the ball more than it affects the bat.

• The ball has less mass, so the equal force on the ball and the bat causes greater acceleration of the ball.

• The bat exerts more force than the ball because the batter is exerting a force on the bat as it hits the ball.

Tags

NGSS.HS-PS2-1

One marble is moving and collides with a stationary marble. Which of these statements is true?

• Each marble exerts a force on the other, and the two forces are equal and in opposite directions

• Each marble exerts a force on the other, and the two forces are the same in magnitude and direction

• Each marble exerts a force on the other, and the two forces are proportional to the masses of the marbles.

• The moving marble exerts a force on the stationary marble, but the stationary marble does not exert a force on the moving marble.

Tags

NGSS.HS-PS2-1

NGSS.HS-PS2-2

A soccer player kicks a ball. The player's foot exerts a force on the ball. The ball exerts a force on the foot. Why don't the forces cancel out to result in a net force of zero?

• The ball moves before the forces can cancel out.

• The forces become unbalanced due to the air resistance.

• The force on the ball is greater than the force on the foot.

• The forces are exerted on different objects, and neither force is zero.

Tags

NGSS.HS-PS2-1

The front of a car is designed to crumple during a crash. What is the purpose of that?

• To decrease the mass of the car, decreasing the force of the collision

• To increase the amount of time it takes for the collision to occur, decreasing the force of the collision

• To increase the amount of time it takes for the collision to occur, decreasing the acceleration of the car

• To decrease the amount of time it takes for the collision to occur, increasing the acceleration of the car

Tags

NGSS.HS-PS2-1

NGSS.HS-PS2-3

A golfer has a choice of several golf clubs with different masses that he can use to hit a golf ball. He can swing all the clubs at the same speed. If he wants to hit the golf ball as far as possible, which club should he choose?

• The club with the greatest mass because it will have a greater acceleration

• The club with the smallest mass because it will have a greater acceleration

• The club with the greatest mass because it will provide the largest force to the golf ball

• The club with the smallest mass because it will provide the largest force to the golf ball

Tags

NGSS.HS-PS2-1

Newton's Third Law

Ben has two carts with masses of 100g and 200g. He pushes the smaller cart toward the larger cart and they collide. The smaller cart rebounds back in the direction it came from. He measures the force on the smaller cart from the larger cart to be 5N.

What was the magnitude of the acceleration of the smaller cart?

• 20 m/s^2

• 50 m/s^2

• 200 m/s^2

• 500 m/s^2

Tags

NGSS.HS-PS2-1

Newton's Third Law

Ben has two carts with masses of 100 g and 200 g. He pushes the smaller cart toward the larger cart and they collide. The smaller cart rebounds back in the direction it came from. He measures the force on the smaller cart from the larger cart to be 5 N.

What force does the smaller cart exert on the larger cart?

• 2.5 N

• 5 N

• 10 N

• 15 N

Tags

NGSS.MS-PS2-1