Physical Science Post Test Review

What is speed?

• A. A measure of how fast something is moving.

• B. Speed is the distance covered per unit of time.

• C. Speed is always measured in terms of a unit of distance divided by a unit of time.

• D. All of the above.

Tags

NGSS.MS-PS3-1

One possible unit of acceleration is ___________.

• A. m/s

• B. Nm

• C. m/s²

• D. Ns

Tags

NGSS.HS-PS2-1

What is the minimum resultant velocity vector possible when adding (or subtracting) a 3-m/s velocity to a 8-m/s velocity?

• A. 2.67 m/s

• B. 11 m/s

• C. 8 m/s

• D. 5 m/s

What is the maximum resultant velocity vector possible when adding a 3-m/s velocity to a 8-m/s velocity?

• A. 24 m/s

• B. 11 m/s

• C. 8 m/s

• D. 5 m/s

Suppose you take a trip that covers 360 km in 9 hours. Your average speed is

• A. 324 km/h

• B. 3240 km/h

• C. 40 km/h

• D. 351 km/h

Tags

NGSS.MS-PS3-1

How does a vector quantity differ from a scalar quantity?

• A. A scalar quantity has direction only, while vectors have magnitude and direction.

• B. A vector quantity has direction only, while scalars do not.

• C. A scalar has direction and magnitude, while a vector has magnitude only.

• D. A vector quantity has direction and magnitude, while a scalar has magnitude only.

Suppose you are in a car that is going around a curve. The speedometer reads a constant 30 miles per hour. Which of the following is true?

• A. You and your car are accelerating.

• B. Your speed is not constant.

• C. Your velocity is constant.

• D. None of the above.

Tags

NGSS.HS-PS2-1

The law of interia applies to

• A. moving objects.

• B. objects at rest.

• C. both A. and B.

A 45 N force and a 75 N force act on an object but in opposite directions. What is the net force acting on the object?

• A. 30 N, in the direction of the 75 N force.

• B. 120 N, in the direction of the 45 N force.

• C. 45 N, in the direction of the 75 N force

• D. 75 N, in the direction of the 45 N force

Tags

NGSS.MS-PS2-2

If a hockey puck slides across the ice, it will eventually slow down a little because of ___________.

• A. intertia

• B. friction

• C. both A. and B.

• D. none of the above

Tags

NGSS.MS-PS2-2