Unit 4 Force and Motion Pre-Test

An airplane is flying at 80 kilometers per hour when a strong tail wind, traveling in the same direction at 5 kilometers per hour, hits the airplane. How can the net force acting on the airplane be calculated?

• add the forces

• subtract the forces

• multiply the forces

• divide the forces

Tags

NGSS.MS-PS2-2

Which of the following best describes the force of materials sliding against one another?

• gravity

• inertia

• friction

• momentum

Velocity can only be described by including both

• speed and direction of the object in motion.

• mass and direction of the object in motion.

• speed and volume of the object in motion.

• mass and volume of the object in motion.

Newton's first law of motion states that an object at rest will remain at rest or an object in motion will remain in a constant motion, unless acted on by an outside force. Another name for this law is the

• law of acceleration.

• law of gravity.

• law of inertia

• law of momentum.

The picture shows Haile's paper airplane flying through the air. Haile's plane travels forward for a few feet and then begins to fall. What would explain the plane's ability to travel forward for a few feet without falling?

• The speed of the plane is equal to the speed of the oncoming air that pushes on the plane.

• The speed of the plane is greater than the speed of the oncoming air that pushes on the plane.

• The force of the air pushing up on the plane is equal to the force of gravity pulling down on the plane.

• The force of gravity pulling down on the plane is greater than the force of the air pushing up on the plane.

Tags

NGSS.MS-PS2-2

NGSS.MS-PS2-4

The graph shows distance versus time for an object. Which of the following correctly describes the object's motion?

• The object is moving with increasing acceleration

• The object is moving with constant acceleration.

• The object is moving with increasing velocity.

• The object is moving with constant velocity.

Tags

NGSS.MS-PS3-1

If an equal force is applied to each of the following, which would be the least affected?

• 
• 
• 
• 

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

The picture shows the space shuttle leaving Earth. How is the space shuttle able to leave Earth's surface?

• The space shuttle's engines create an upward force greater than the downward force of gravity.

• The space shuttle's engines create a downward force greater than the upward force of gravity.

• The space shuttle's engines create an upward force less than the downward force of gravity.

• The space shuttle's engines create a downward force less than the upward force of gravity

Tags

NGSS.MS-PS2-2

A box is initially at rest on a ramp. If the box is subject to balanced forces, the box will

• lift off of the surface of the ramp.

• remain stationary on the ramp.

• slide down the ramp.

• slide up the ramp.

Tags

NGSS.MS-PS2-2

Ezra's mother told her she was "moving at a snail's pace." How could Ezra determine the average speed of a snail?

• She can subtract the snail's density from the time it takes for it to cover a set distance

• She could add together the times it takes the snail to cover several set distances.

• She could multiply the snail's mass by the time it takes it to cover a set distance.

• She could divide a set distance by the time it takes the snail to move that distance.