Question 1

After applying lubricant on the chain and gear of your bicycle, you can now pedal it with ease. Why is it so?

Accepted Answer

The lubricant reduced the friction between the chain and gears

Answer

The lubricant increased the friction between the chain and gears

Answer

The lubricant cleaned the chain and gears

Answer

The lubricant removed the rust from the chains

Question 2

Why do you weigh less on the Moon compared here on Earth?

Accepted Answer

Because the moon has a lesser mass compared to Earth

Answer

Because the moon only reflects light from the sun

Answer

Because the moon has a smaller size

Answer

Because the moon has no water on it

Question 3

Why do you slide faster in waterslides compared to regular slides?

Accepted Answer

Because the water reduces friction

Answer

Because water slides are rough

Answer

Because the water increases the force of gravity

Answer

Because waterslides are short

Question 4

Which of the following objects can reduce friction?

Accepted Answer

oil

Answer

alcohol

Answer

rocks

Answer

salt

Question 5

What kind of force does the ground exert against your feet?

Accepted Answer

gravity

Answer

mass

Answer

friction

Answer

contact

Question 6

A meteor falling down through the Earth's atmosphere

Accepted Answer

Gravity

Answer

Friction

Question 7

A skydiver falling through the air with her parachute open

Accepted Answer

Gravity

Answer

Friction

Question 8

A bowling ball rolling towards the pins

Accepted Answer

Friction

Answer

Gravity

Question 9

A car parked on a sloping road

Accepted Answer

Friction

Answer

Gravity

Question 10

A boy zooming down through a slide in the park

Accepted Answer

Friction

Answer

Gravity

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