Balanced and Unbalanced Forces Formative

You push a box with 100 N of force but it doesn't move. Which of the following must be true?

• the forces are unbalanced

• the forces are balanced

• there is no friction

• static friction is greater than 100N

A box is moving at a constant speed of 1.5 m/s. Which of the following must be true?

• the forces are unbalanced

• the forces are balanced

• there is no friction

• the box is accelerating

A ball accelerates down a steep driveway. Which of the following must be true?

• the forces are balanced

• the forces are unbalanced

• the net force is zero

• the ball is moving with a constant velocity

Tags

NGSS.MS-PS2-2

A small unmanned spacecraft is accelerating in space when it's engines shut off. Describe the motion of the spacecraft once the engines have stopped.

• it begins to slow down

• it moves at a constant speed

• it continues to speed up

• it speeds up for a small time and then slows down

Tags

NGSS.MS-PS3-5

The horizontal forces acting on a toy wagon are balanced. Which of the following could be true of the wagon's motion?

• the wagon is speeding up

• the wagon is moving at a constant speed

• the wagon is not moving

• the wagon is slowing down

Tags

NGSS.MS-PS2-2

The horizontal forces acting on a toy wagon are unbalanced. Which of the following could be true of the wagon's motion?

• the wagon is speeding up

• the wagon is moving at a constant speed

• the wagon is not moving

• the wagon is slowing down

Tags

NGSS.MS-PS2-2

The forces acting on a small block of wood are balanced. Which of the following is true?

• the net force is zero

• the block is not moving

• the block is not acclerating

• the net force is

  non-zero

A man jumps from an airplane and accelerates downward until the upward force of air resistance is the same as the downward force of gravity. What happens when these forces become balanced?

• the man stops moving

• the man stops accelerating

• the man slows down

• the man speeds up

Tags

NGSS.MS-PS2-2

A car is accelerating down a straight road when the forces on the car become balanced.
What happens to the motion of the car?

• the car stops moving

• the car stops accelerating

• the car slows down

• the car speeds up

Tags

NGSS.MS-PS2-2

Group the following as either "balanced" or "unbalanced" forces.

Groups:

(a) balanced forces

,

(b) unbalanced forces

• constant speed

• non-zero net force

• not moving

• slowing down

• zero net force

• speeding up

Tags

NGSS.MS-PS2-2