Unit Review - Linear Motion

The graph shows the speed of a car over time. On the graph, which letters indicate times when the forces on the car were balanced? Select THREE answers. You can select up to 2 answers.

• B

• C

• D

• G

Tags

NGSS.MS-PS3-1

The net force on a moving ball is zero. What could describe the motion of the ball?

• A ball moves in a straight line on a level surface at a constant speed.

• A ball tethered to a pole spins in a circle.

• A ball free falls to the ground.

• A ball slows on a level surface from a constant speed to rest.

The diagram shows a 5.00-kilogram (kg) block at rest on a flat table. Which of the following must occur for the box to move?

• Equal forces must be applied to the front and back sides of the box.

• Equal forces must be applied to the top and bottom sides of the box.

• A force greater than the force of gravity must be applied to the top of the box.

• A force greater than the force of friction must be applied to one side of the box.

Tags

NGSS.MS-PS2-2

Which graph represents a baseball player accelerating away from a base located at the origin?

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Based on the 'Position vs. Time' graph, what does the curve indicate about the object's motion?

• The object is moving at a constant speed.

• The object is accelerating.

• The object is decelerating.

• The object is stationary.

Tags

NGSS.MS-PS3-1

Students push a cart along a smooth floor and collect data to produce the graph shown. The students use this data to determine and graph the velocity of the cart. Which graph accurately represents the velocity of the cart?

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Tags

NGSS.MS-PS2-2

Examine graph showing the velocity of a cart over time. Which of the following best describes the motion of the cart?

• The cart moves at a constant velocity.

• The cart accelerates uniformly.

• The cart decelerates uniformly.

• The cart goes through varying speeds.

Tags

NGSS.MS-PS3-1

Select the sentence of Jordan's journey that would coincide with a flat segment on a graph of position versus time.

• Jordan takes off in a helicopter and begins flying north at a constant speed.

• She turns around and flies back over the forest until she finds the wolves.

• She then lets the helicopter hover in place while she watches the wolves.

• Finally, she resumes flying in her original direction at a constant speed.

Which of the following best describes the shape of a distance over time graph for a toy that is NOT moving?

• A. A flat vertical line

• B. A flat horizontal line

• C. A line curving upward

• D. A line curving downward

Which terms correctly describe a car's motion? A car traveling 75 miles per hour is a description of a car's speed, while a car traveling 75 miles per hour north is a description of a car's velocity.

• speed and velocity

• acceleration and momentum

• distance and displacement

• force and energy