Forces and Energy Lessons 1-3

What is the definition of motion?

• A change in an object's position

• The speed of an object

• A force that slows objects down

• The direction an object is moving

Tags

NGSS.MS-PS3-1

NGSS.MS-PS3-5

Which of the following best describes velocity?

• The distance an object moves in a certain time

• The speed and direction of an object

• A force that pulls objects together

• A change in velocity over time

If you push a toy car and it speeds up, what concept does this demonstrate?

• Friction

• Gravity

• Acceleration

• Contact force

Tags

NGSS.MS-PS2-2

What is the difference between contact force and noncontact force?

• Contact force happens when objects are touching; noncontact force happens without touching

• Contact force is always stronger than noncontact force

• Noncontact force only happens in water

• Contact force only happens with magnets

Tags

NGSS.MS-PS2-5

A student rubs their hands together and feels them get warm. Which force is responsible for this?

• Gravity

• Friction

• Acceleration

• Velocity

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-5

What is inertia?

• The tendency of an object in motion to stay in motion and an object at rest to stay at rest

• The ability of an object to do work

• The energy an object has because of its position

• The amount of force needed to move an object

If a bowling ball is moving faster, what will happen when it hits the pins?

• It will knock over more pins

• It will stop immediately

• It will bounce back

• It will roll slower

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

NGSS.MS-PS3-1

NGSS.MS-PS3-5

What is the definition of energy?

• The ability to do work

• The force needed to stop an object

• The speed of an object

• The mass of an object

Which of the following best explains why a heavier object needs more force to move at the same speed as a lighter object?

• More mass requires greater force for the same acceleration

• Heavier objects have less energy

• Lighter objects are always faster

• Force does not affect speed

Tags

NGSS.MS-PS2-2

A toy car is placed at the top of a hill. What can you say about its potential energy compared to when it is at the bottom of the hill?

• It has more potential energy at the top of the hill

• It has less potential energy at the top of the hill

• Its potential energy does not change

• It has no potential energy at the top of the hill

Tags

NGSS.MS-PS3-2