SPS8A

What is the effect of an unbalanced force on the motion of an object?

• It changes the speed of the object.

• It changes the direction of the object.

• It changes both the speed and direction of the object.

• It does not affect the motion of the object.

Tags

NGSS.MS-PS2-2

Examine the distance vs. time graph below and determine which of the following statements best describes the motion displayed on the graph.

• The object is moving away from the starting point at a constant speed.

• The object is increasing in speed.

• The object is not moving.

• The object is decreasing in speed.

What is the acceleration of the car in the graph?

• The acceleration of the car changes over time.

• 0 m/s²

• 3.75 m/s²

• −3.75 m/s²

Tags

NGSS.MS-PS3-1

Which of the following position vs. time graphs shows an object that is moving with a constant positive velocity?

• A

• B

• C

• D

What happens to the magnetic field around a wire when the electric current through the wire increases?

• It decreases

• It remains the same

• It increases

• It reverses direction

Tags

NGSS.MS-PS2-3

NGSS.MS-PS2-5

What is the difference between speed and velocity?

• Speed is a vector quantity, while velocity is a scalar quantity.

• Speed is a scalar quantity, while velocity is a vector quantity.

• Speed and velocity are both scalar quantities.

• Speed and velocity are the same thing.

What is the formula to calculate acceleration?

• acceleration = final velocity / initial velocity * time

• acceleration = (final velocity - initial velocity) / time

• acceleration = final velocity + initial velocity * time

• acceleration = final velocity * initial velocity / time

What is the unit of acceleration?

• m/s

• m/s^2

• cm/s^2

• km/h

Give an example of an unbalanced force.

• Pushing a car uphill

• Pushing a car downhill

• Pulling a car downhill

• Pushing a car on a flat surface

Tags

NGSS.MS-PS2-2

If the net force acting on an object is zero, what can you say about its motion?

• The object is moving in a circular path.

• The object is accelerating.

• The object is either at rest or moving at a constant velocity.

• The object is moving in a straight line.