Physics - Review II (Units 1-4)

The diagram below shows a granite block being slid at constant speed across a horizontal concrete floor by a force parallel to the floor. Which pair of quantities could be used to determine the coefficient of friction for the granite on the concrete?

• mass and speed of the block

• mass and normal force on the block

• frictional force and speed of the block

• frictional force and normal force on the block

A 0.10-kilogram model rocket’s engine is designed to deliver an impulse of 6.0 newton seconds. If the rocket engine burns for 0.75 second, what average force does it produce?

• 4.5 N

• 8.0 N

• 45 N

• 80. N

Tags

NGSS.HS-PS2-1

The diagram shows a compressed spring between two carts initially at rest on a horizontal frictionless surface. Cart A has a mass of 2 kilograms and cart B has a mass of 1 kilogram. A string holds the carts together. What occurs when the string is cut and the carts move apart?

• The magnitude of the acceleration of cart A is one-half the magnitude of the acceleration of cart B.

• The length of time that the force acts on cart A is twice the length of time the force acts on cart B.

• The magnitude of the force exerted on cart A is one-half the magnitude of the force exerted on cart B.

• The magnitude of the impulse applied to cart A is twice the magnitude of the impulse applied to cart B.

Tags

NGSS.HS-PS2-1

NGSS.HS-PS2-2

The diagram shows a compressed spring between two carts initially at rest on a horizontal frictionless surface. Cart A has a mass of 2 kilograms and cart B has a mass of 1 kilogram. A string holds the carts together. After the string is cut and the two carts move apart, the magnitude of which quantity is the same for both carts?

• momentum

• velocity

• inertia

• kinetic energy

Tags

NGSS.HS-PS2-2

In the diagram below, a box is at rest on an inclined plane. Which vector best represents the direction of the normal force acting on the box?

• A

• B

• C

• D

Tags

NGSS.HS-PS2-1

During a collision, an 84-kilogram driver of a car moving at 24 meters per second is brought to rest by an inflating air bag in 1.2 seconds. The magnitude of the force exerted on the driver by the air bag is approximately

• 7.0 × 10¹ N

• 8.2 × 10² N

• 1.7 × 10³ N

• 2.0 × 10³ N

Tags

NGSS.HS-PS2-1

In which situation is the net force on the object equal to zero?

• a satellite moving at constant speed around Earth in a circular orbit

• an automobile braking to a stop

• a bicycle moving at constant speed on a straight, level road

• a pitched baseball being hit by a bat

Tags

NGSS.HS-PS2-1