Force, Motion and Energy

A 1,100 kg car comes uniformly to a stop. If the vehicle is accelerating at -1.2 m/s², which force is closest to the net force acting on the vehicle?

• -9,600 N

• -1,300 N

• -900 N

• -94 N

Tags

NGSS.MS-PS2-2

A physics teacher performed a demonstration for a science class by pulling a crate across the floor and measuring the force with a spring scale. While she pulled, a student measured the acceleration of the crate with a handheld electronic device. The results of three trials are shown in the table.

The teacher asked the class to calculate the acceleration of the crate based on the crate's mass and the force she applied. What conclusion can be made about the difference between the calculated acceleration and the actual acceleration that occurred in the three trials?

• Another force in the direction of the motion produced a lower acceleration than calculated.

• An opposing force caused by friction produced a lower acceleration than calculated.

• Another force in the direction of the motion produced a higher acceleration than calculated.

• An opposing force caused by friction produced a higher acceleration than calculated.

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

An archer shot a 0.06 kg arrow at a target. The arrow accelerated at 5,000 m/s² to reach a speed of 50.0 m/s as it left the bow. During this acceleration, what was the net force on the arrow to the nearest newton?

• 300 N

• 350 N

• 400 N

• 450 N

Tags

NGSS.MS-PS2-2

A leaf fell from a tree branch. The path it followed is shown in the diagram. Which of these best describes why the leaf fell in crooked path instead of straight down?

• Objects with irregular shapes never fall in straight lines.

• Air currents and gravity applied changing and unbalanced forces to the leaf.

• The upward force of the air on the leaf was greater than the downward force of gravity.

• Once the leaf was in motion, it continued moving in the same direction because the forces were balanced?

Tags

NGSS.MS-PS2-2

NGSS.MS-PS2-4

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 net 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 can be used to find the spacecraft's acceleration if its engine created a net force of 0.10 N?

• 0.10 N / 500 kg

• 500 kg . 0.10 N

• 500 kg / 0.10 N

• 500 kg + 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 2,00 m/s². What is the net force, to the nearest newton, that accelerates the ball?

• 100 N

• 200 N

• 300 N

• 400 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 amount of force. Which cart has the greatest change in speed?

• 
• 
• 
• 

Tags

NGSS.MS-PS2-2

A basketball with a mass of 0.60 kg is accelerated with a force of 10.8 N. if the resisting forces are ignored, what is the acceleration of the basketball to the nearest m/s²?

• 18 m/s²

• 18.5 m/s²

• 19 m/s²

• 20 m/s²

Tags

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