Newton's Second Law

An object's velocity can be changed by changing its speed, its direction, or both.

• True
• False

Tags

NGSS.MS-PS3-1

A change in velocity over time is called ___________.

• speed
• force
• acceleration
• direction

The increasing speed of a falling object is caused by _____________.

• force
• mass
• speed
• gravity

Tags

NGSS.MS-PS2-4

Newton's second law of motion describes acceleration as force divided by __________.

• mass
• inertia
• speed
• direction

Tags

NGSS.MS-PS2-2

Because of inertia, an object in circular motion has a tendency to move away in a ______________.

• curved path

• straight line

• increasing speed

• decreasing speed

The force that pulls an object in a circular motion and keeps it in a circular motion is centripetal force.

• True
• False

If a net force acts on a moving object in the direction that the object is moving, the object will __________________.

• slow down

• speed up

• stay at a constant velocity

• change 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

Tags

NGSS.MS-PS2-2

What is the force needed to make a 20 kg bike accelerate at 10 m/s/s.

• 25 Newtons

• 20 Newtons

• 200 Newtons

• 10 Newtons

When force is 20 N, mass is 5 kg, what is acceleration?

• 25 m/s/s

• 5 m/s/s

• 100 m/s/s

• 4 m/s/s