Year 9 Forces & motion revision

In the free-body diagram, which of the following is the weight force acting on the balloon?

• 5120 N

• 950 N

• 1520 N

• 4050 N

Tags

NGSS.MS-PS2-4

Who wins the tug of war with what resultant force?

• The person on the left with 20 N

• The person on the left with 80 N

• The people on the right with 20 N

• The people on the right with 100 N

Tags

NGSS.MS-PS2-2

Two forces act on an object to the right at the same time. What is the resultant force?

• 9 N to the right

• 9 N to the left

• 3 N to the left

• 18 N to the left

Tags

NGSS.MS-PS2-2

The biker travels at constant velocity. All of the following are true except-

• he has a resultant force acting on him.

• the ground reaction is equal to his weight.

• the force of friction acts opposite the direction of his motion.

• the force of friction is equal to the forward force he applies.

Tags

NGSS.MS-PS2-2

According to Newton's First Law (balanced forces), an object at rest will tend to do which of the following?

• stay at rest

• stay in motion

• speed up

• change in direction

According to Newton's First Law (balanced forces), an object in motion will tend to:

• stay at rest

• stay in motion

• change in direction

• slow down

Which of the following could cause an acceleration?

• A balance between two forces

• A balance between three forces

• Two unbalanced forces

• Zero forces

Tags

NGSS.MS-PS2-2

Multiplying the mass and acceleration of an object would give you:

• the force of gravity

• the force of friction

• the velocity

• the resultant force

Tags

NGSS.HS-PS2-1

An object has a mass of 10 kg. What is its weight?

• 0.10 kg

• 0.10 N

• 100 kg

• 100 N

Tags

NGSS.MS-PS2-4

An unbalanced force causes:

• change in mass
• acceleration
• balanced forces
• change in time

Tags

NGSS.MS-PS2-2