Forces Quiz A 2020

An object's resistance to its change in motion is its

• Friction
• Inertia
• Gravity
• Pressure

As the force applied to an object increases, its acceleration______

• decreases
• increases
• stays the same
• does not exist

Tags

NGSS.MS-PS2-2

As the mass of an object decreases, its acceleration _______

• decreases
• increases
• stays the same
• does not exist

Tags

NGSS.MS-PS2-2

A hiker pushed on a large rock, but it did not move. He pushed 500 N to the left. How much force does he feel from the rock?

• Less than 500

• 500

• More than 500

• Can't be determined without the rock's mass

The combination of all forces acting on an object is called __________

• Gravity

• Net Force

• Vector Quantity

• Acceleration

An object that has balanced forces such that the net force on it is zero must be at rest

• True because zero net force results in zero motion

• False because the object may be moving with constant velocity

• only when the forces are really small

• the object cannot move while the forces acting on it are balanced

Tags

NGSS.MS-PS2-2

In the absence of an external force (when there is zero force) a moving object will

• stop immediately

• slow down and eventually stop

• speed up

• continue at a constant velocity

A change in velocity over time is called ___________.

• speed
• force
• acceleration
• direction

Acceleration is net force divided by __________.

• mass

• velocity

• speed

• direction

What happens when unbalanced forces act on an object at rest?

• the object remains at rest

• the object begins moving in an unpredictable direction

• the object begins moving in the direction of the net force

• the object begins moving opposite to the direction of net force