Changes in Motion and Force Unit Review

A person pushes against a wall with 15N of force. The wall doesn't move. The wall exerts how much force on the student?

• 15N

• greater than 15N

• less than 15N

• 0N

Tags

NGSS.MS-PS2-1

What is the force exerted when an object has a mass of 3 kg and the acceleration of 9 m/s²?

• 27N

• 3N

• .33N

• 0N

Tags

NGSS.MS-PS2-2

What would cause the person on the right to change position?

• The force applied by the two people on the right would have to be greater than 200N.

• the force applied by the two people on the right would have to be less than 200 N.

• The person on the left would need to turn around

• It is impossible

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

None of the players in this game of tug-o-war changes position. Is work being done?

• Yes

• No

Tags

NGSS.MS-PS2-1

In what direction with the box move?

• right

• left

• up

• down

Tags

NGSS.MS-PS2-2

What is the net force acting on the box?

• 5N

• 25N

• 15N

• 0N

Tags

NGSS.MS-PS2-2

In a game of tug-of-war, there is a force pulling to right with 70N and a force pulling to the left with 68N. What will be the resulting motion?

• to the right

• to the left

• no motion

• everyone will move in the direction they are pulling

Tags

NGSS.MS-PS2-2

There is a book sitting at rest on a chair. Which of the following is true?

• There are many forces acting on the book, but they balance each other out

• The book exerts no force on the chair

• The chair exerts no force on the book

• all of these

Tags

NGSS.MS-PS2-2

The wagon is slowing down due to friction.

• balanced forces

• unbalanced forces

Tags

NGSS.MS-PS2-2

The rollerblades are resting on the curb.

• balanced forces

• unbalanced forces