Physics quiz

If a girl is climbing up a ladder while carrying a light bulb, is she doing any work?

• yes, the object is moving in the direction of the force

• yes, she has something in her hand

• no, she is not moving the object

• no, the bulb doesn't weigh enough to count

How much work is a cat doing if it is picking up a dead mouse (1N) off the ground? (.2m)

• none, cats don't do work

• none, the mouse is not alive

• 0.2 J of work

• 1.2 J of work

What is energy?

• the ability to turn on a light

• the amount of electricity needed to light one light bulb

• the ability to do do work

• the temperature of an oven when making brownies

How much power is used if 5 joules of work are done in 1 second?

• 0.5 watts

• 1/5 watts

• 5 watts

• 1 watt

Which has gravitational potential energy?

• Elf on a shelf

• tennis ball on the floor

• roller coaster car at the bottom of the lowest hill

Tags

NGSS.MS-PS3-2

NGSS.MS-PS2-4

Which has elastic potential energy?

• pencil on a desk

• stretched rubber band

• food on a plate

Tags

NGSS.MS-PS3-2

Which has chemical potential energy?

• food on plate

• gas in your car's gas tank

• stretched rubber band

• pencil on the desk

Tags

NGSS.MS-PS1-1

What is a simple machine?

• a device that changes the force needed to lift an object

• a device that changes the way work is done

• a device that heats up food in 2 minutes

• a device that increases the amount of force needed

Tags

NGSS.MS-PS2-2

If a fixed pulley has a MA of 1, how does it help us?

• Decreases the amount of force needed to lift an object

• Increases the amount of force needed to lift an object

• Changes the direction of the force

• Is not really helpful

The fulcrum on a 1st class lever is ...

• on the left

• on the right

• in the middle