Unit 2 -Test Review

A system undergoes acceleration only when acted on by a(n):

• net force (total force >0N)

• pair of forces

• action reaction forces

• internal interaction

• all of these

Tags

NGSS.MS-PS2-2

Which has zero acceleration? An object:

• at rest

• moving a constant velocity

• that has balanced forces acting on it

• all of the above

When the net force on an object is zero, what is the acceleration of that object?

• less than zero

• zero

• greater than zero

• all of these

Tags

NGSS.MS-PS2-2

Your car is coasting (no gas or brake) on level ground at 60 km/hr and you apply the brakes until the car slows to 40 km/hr. If you suddenly release the brakes and no other forces are acting, the car would:

• regain its higher initial speed

• continue moving at 40 km/hr

• both of these

Tags

NGSS.MS-PS3-5

An object following a straight line path at constant speed:

• has a net force acting on it in the direction of the motion

• has zero acceleration

• has NO forces acting on it

If an object's mass is decreasing while a constant force is applied to the object, its acceleration would:

• decrease

• increase

• remain the same

Tags

NGSS.MS-PS2-2

An object is propelled along a straight-line path in space by a force. If the object sweeps up extra particles and its mass becomes twice as much, its acceleration:

• quadruples

• doubles

• stays the same

• halves

Tags

NGSS.MS-PS2-2

_______ are needed to cause a change in motion?

• Unbalanced Forces

• Balanced Forces

• Friction

• Gravity

Tags

NGSS.MS-PS2-2

Is a force needed to change the speed of a moving object?

• No

• Yes

• Sometimes

• Only if it's accelerating

Tags

NGSS.MS-PS2-2

Is a force needed to keep an object moving at a steady speed?

• No

• Yes

• Only in space

• Only on Earth

Tags

NGSS.MS-PS3-1