forces and motion basics

A body in motion essentially acquires

• Kinetic energy

• Mechanical energy

• Potential energy

• Heat energy

Tags

NGSS.MS-PS3-1

NGSS.MS-PS3-4

Find the acceleration (in m/s2) of a body which accelerates from 15 m/s to 40 m/s in 2 seconds

• 12.5

• 25

• 27.5

• 55

Tags

NGSS.HS-PS2-1

What is the value of acceleration due to gravity on the surface of the earth?

• 9.6 cm/s2

• 10.8 m/s2

• 9.8 m/s2

• 9.8 cm/s2

Find the acceleration (in m/s2) produced in a body of mass 4 kg when a force of 24 N is applied on it.

• 96

• 6

• 12

• 48

Tags

NGSS.MS-PS2-2

What is the net force on an 800-kg airplane flying with a constant velocity of 160 km/hour north?

• zero

• 160 N

• 800 N

• 128 000 N

Tags

NGSS.HS-PS2-1

If you push on a railroad boxcar with a force of 200 N and it doesn't move, you can conclude that

• Newton's second law is not valid.

• This force is canceled by the third law force.

• The boxcar has too much mass to accelerate.

• There is a force of 200 N in the opposite direction.

Tags

NGSS.HS-PS2-1

What is the mass of a cart that has an acceleration of 5 m/s/s when a net force of 2000 N is applied to it?

• 10,000 kg

• 2000 kg

• 1000 kg

• 400 kg

Tags

NGSS.MS-PS2-2

A ball with a weight of 20 N is thrown vertically upward. What is the acceleration of the ball just as it reaches the top of its path?

• zero

• 10 m/s/s downward

• 10 m/s/s upward

• The acceleration cannot be determined

Tags

NGSS.HS-PS2-1

The same net force is applied to object A and object B. The observed accelerations of the two objects are not the same; object A has an acceleration three times that of object B. Which of the following is correct?

• Object A has three times the mass of object B

• Object A has one-third the mass of object B.

• Object A has a different, less streamlined shape than object B.

• Object A has more friction than object B

Tags

NGSS.HS-PS2-1

What is the Formula for Force in terms of acceleration?

• F=Ma

• F=Mv

• F=ars

• F=mdg