Mass & Weight

An object has a mass of 50kg. The gravitational field strength on Earth is 10.0N/ kg. The gravitational field strength on a distant planet is 4.0N/ kg. What is the weight of the object on Earth, and what is its weight on the distant planet?

• A

• B

• C

• D

An astronaut in an orbiting spacecraft experiences a force due to gravity. This force is less than when she is on the Earth’s surface. Compared with being on the Earth’s surface, how do her mass and her weight change when she goes into orbit?

• A

• B

• C

• D

A car travels 100km. The journey takes two hours. The highest speed of the car is 80km/ h, and the lowest speed is 40km/ h. What is the average speed for the journey?

• 40km/ h

• 50km/ h

• 60km/ h

• 120km/ h

Weight is an example of which quantity?

• acceleration

• force

• mass

• pressure

The mass of an object is measured on Earth. The mass is 5.0kg. The object is taken to the Moon. The mass of the object is measured on the Moon. What is the mass of the object on the Moon?

• 0 kg

• more than 0kg, but less than 5.0kg

• 5.0 kg

• more than 5.0kg

Which statement about mass or weight is correct?

• Mass is a force.

• Mass is measured in newtons.

• Weight is a force.

• Weight is measured in kilograms.

What is the weight of an object?

• the force of gravity on the object

• the gravitational potential energy of the object

• the internal energy of the object

• the mass of the object

Which instrument is used to compare the masses of objects?

• a balance

• a barometer

• a manometer

• a measuring cylinder

• density.

• temperature.

• volume.

• weight.

The mass of an astronaut is 70kg on the Moon. What is the mass of the astronaut on the Earth?

• 7kg

• 70kg

• 80kg

• 700kg