Y6 Forces, electrical circuits and light

Calculate the weight of the bowling ball. The ball has a mass of 7.2kg. (Remember 1 kg: 10 N)

• 720N

• 72kg

• 72N

• 43.2 kg

Answer explanation

7.2kg x 10N = 72 N.

Mass is measured in kilograms and grams whereas weight is measured in Newtons.

A bicycle has a mass of 11kg. How much does the bicycle weigh? (Remember 1 kg: 10 N)

• 1.1 kg

• 110 N

• 1.1 N

• 110 kg

Answer explanation

11 kg x 10 N = 110 N.

Mass is measured in kilograms and grams whereas weight is measured in Newtons.

A measurement of the amount of matter an object contains, measured in kilograms.

• Weight

• Shape

• Volume

• Mass

Answer explanation

Mass and weight are often confused. Mass is how much matter an object is made up of whereas weight is how much gravity pulls the object down. The mass of an object does not change. An 11 kg bicycle on earth will be a 11 kg bicycle on the moon.

An astronaut has a mass of 110 kg. The gravitational pull of the moon is 1.6 N/kg. What is the weight of the astronaut on the moon?

(Remember: weight (N) = mass (kg) x strength of gravity (N/kg))

• 66N

• 176N

• 660N

• 110N

Answer explanation

110kg (astronaut's mass) x 1.6 N/kg (strength of gravity on the moon) = 176N (astronaut's weight on the moon)

In what unit is weight measured?

• Kilograms

• Newtons

• Milliliters

• Centimeters

Answer explanation

Weight is a downward, non-contact force that happens due to an attraction between two masses.

What unit is mass measured in?

• Kilogram

• Newton

• Milliliter

• Centimeter

Answer explanation

Mass is the measurement of the amount of matter an object contains, measured in kilograms (kg).

Look at the red arrows. The cat is a sleep on the chair. The chair supports the cats weight. What force is the chair exerting?

• Friction

• Applied force

• Support force

• Normal force

Answer explanation

Correct answer: Support force. The chair is supporting the weight of the cat.

Accepted answer: The two arrows together are equal. The support force is the same as the weight of cat and together this is normal force.

A falling pen is an example of...

• Normal force

• Friction

• Applied force

• Gravity

A measure of the amount of matter an object contains, measured in kilograms (kg)

• Mass

• Weight

The force that pushes up on an object in water and air.

• Non-contact force

• Contact force

• Upthrust

• Friction