Unit 6 Forces

Two students are working together to build a birdhouse. Student 1 applies a force of 10 N to a wooden board in order to slide it across the table to Student 2. If the force of friction resisting the student's push is 4 N, what is the new force acting on the board?

• 4 N

• 6 N

• 10 N

• 14 N

Tags

NGSS.MS-PS2-2

Deep Space 1 was a spacecraft powered by an engine that gave off xenon particles to change velocity. It had a mass of 500 kg. Which expression can be used to find the spacecraft's acceleration if its engine created a net force of 0.10 N?

Tags

NGSS.MS-PS2-2

A golfer hits a golf ball with a club. The mass of the ball is 0.05 kg. The ball accelerates at 2,000 m/s². What is the net force, to the nearest newton, that accelerates the ball?

• 2.5 N

• 10 N

• 40N

• 100 N

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

Four students push carts filled with sports equipment across the gym. Each student pushes with the same force. Which cart has the greatest change in speed?

• 
• 
• 
• 

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

A student used a video camera to record another student dropping a marble through water in a graduated cylinder. The students watched the video in slow motion and made the observations shown below. During which part or parts of the marble's fall did the marble experience unbalanced forces?

• Part 1 only

• Parts 1 and 2 only

• Part 3 only

• Parts 2 and 3 only

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

A student uses a magnet to move a 0.025 kg metal ball. The magnet exerts a force of 5 N, which causes the ball to begin moving. What is the acceleration of the ball when it begins to move?

• 200 m/s²

• 0.125 m/s²

• 5 m/s²

• 5.025 m/s²

Tags

NGSS.MS-PS2-2

The diagram below shows a sled moving along a smooth, frictionless track. In which sections of the track will the sled experience an unbalanced force?

• Sections 1 and 3

• Sections 2 and 3

• Sections 2 and 4

• Sections 3 and 4

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

The diagram shows a homemade car being pushed with a force of 25 N. The force causes the car to move at a constant speed of 3 m/s. What will happen if the force is changed to 35 N?

• The car will move at a constant speed of 13 m/s.

• The speed of the car will not change.

• The speed of the car will increase.

• The speed of the car will decrease to 1 m/s.

Tags

NGSS.MS-PS2-2

For an investigation, a student measures the speed of a cart as it rolls down a ramp. The student then records the data in the table below. Which of these best explains the student's data?

• The speed of the cart decreases as the cart rolls down the ramp because of friction between the cart and the ramp.

• The speed of the cart increases as the cart rolls down the ramp because the force acting on the cart is greater than the force of gravity.

• The speed of the cart increases as the cart rolls down the ramp because the forces acting on the cart are unbalanced.

• The speed of the cart decreases as the cart rolls down the ramp because the forces acting on the cart are balanced.

Tags

NGSS.MS-PS2-2

Some students measure the acceleration of a wheeled cart being acted on by varying forces. The students record their data in the table shown above. According to the data table, how much force is acting on the cart when the students measure an acceleration of 2.6 m/s²?

• 13 N

• 7 N

• 8 N

• 12 N

Tags

NGSS.MS-PS2-2