Dynamics MC Quiz

According to Newton’s second law, doubling a net force on a system of constant mass will double...

• the mass

• the acceleration

• the force

• the magnitude

Tags

NGSS.MS-PS2-2

Which object has the largest resultant force?

• 
• 
• 
• 

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

In which example does friction act in the direction of forward motion of the object on which it acts?

• on a suitcase accelerating on a conveyor belt

• on sandpaper rubbing a wooden block

• on the skis of a skier accelerating downhill on smooth snow

• on the tyres of a braking car

An apple of mass 0.15kg and weight 1.5N falls from a tree. At one point during its fall, the air resistance on the apple is 0.60N upwards.

What is the acceleration of the apple at this point?

• 4 m/s²

• 6 m/s²

• 10 m/s²

• 14 m/s²

Tags

NGSS.MS-PS2-2

Four of the gravitational forces that act between bodies in the Solar System are described below.

P the force on the Moon due to the Earth

Q the force on the Earth due to the Sun

R the force on the Earth due to the Moon

S the force on the Moon due to the Sun

Which two forces are a Newton’s third law pair (action and reaction)?

• P and Q

• P and R

• Q and S

• R and S

Tags

NGSS.MS-PS2-1

A man pushes a heavy box along the ground.

• A

• B

• C

• D

Tags

NGSS.MS-PS2-2

In which situation is the resultant force on the body equal to zero?

• a car turning a corner at constant speed

• a rock falling freely on the Moon

• a train going up a straight hill at constant speed in a straight line

• an aircraft accelerating along a runway in a straight line

Tags

NGSS.HS-PS2-1

• A

• B

• C

• D

Tags

NGSS.HS-PS2-1

The value of g on the moon is smaller than on the earth because objects have smaller masses on the moon than on the earth.

• True

• False

The “action” force never acts on the same system as the “reaction” force.

• True

• False

Tags

NGSS.MS-PS2-1