Force, Work and Energy

1.A ----- is an inclined plane wrapped around a spiral rod

• wedge

• screw

• lever

2. Things can move without any force acting on them

• True

• False

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

3.A bottle opener is an example of

• lever

• inclined plane

• wedge

• screw

4 . Plants use ------- energy from the sun to make food.

• wind

• heat

• light

Tags

NGSS.MS-LS1-6

5 . This is the most readily available and non-polluting source of energy.

• sound energy

• solar energy

• electrical energy

6.An example of the inclined plane

• ramp

• pulley

• screw driver

Tags

NGSS.MS-ETS1-1

7. These are burnt and to produce heat and power

• machines

• fuels

• leaves

Tags

NGSS.MS-PS3-3

8.Wind energy cannot be used to generate electricity.

• True

• False

9.Which of the following is not correct?

• friction slows a moving object

• smoother the surface greater the friction

• rougher the surface greater the friction

10.The force by which the earth pulls objects towards itself is called -------

• gravitational force

• frictional force

• magnetic force

Tags

NGSS.MS-PS2-4