Physical science test Q. 75-89

Which of the following describes the particle’s motion for the time interval between 4 and

8 seconds?

• A. The particle has a constant velocity equal to –2.5 m/s.

• B. The particle has a constant velocity equal to +2.5 m/s.

• C. The particle has a constant acceleration equal to –2.5 m/s^2.

• D. The particle has a constant acceleration equal to +2.5 m/s^2.

What is the weight, in newtons, of a 52-kilogram object on Earth’s

surface?

(Note: The acceleration due to gravity is 9.8 m/s^2.)

• A. 449 newtons

• B. 510 newtons

• C. 532 newtons

• D. 561 newtons

The weight of an object can change even when the mass stays the same. Which

statement correctly identifies a relationship between mass and weight?

• A. The weight of an object depends on its mass and its volume.

• B. Gravity affects the weight of an object but not its mass.

• C. The mass of an object depends on its weight and size.

• D. Magnetic fields can affect mass but not weight.

An object such as a hammer weighs less on the Moon than on Earth. This is because the Moon has a

• A. thinner atmosphere than Earth.

• B. smaller diameter than Earth.

• C. stronger magnetic field than Earth.

• D. lower mass than Earth.

An astronaut collected rocks from the Moon. After returning to Earth, the astronaut measured the weight and mass of each rock. How would the weight and mass of the rocks on Earth compare to measurements the astronaut made on the Moon?

• A. The mass would be the same, but the weight would be different.

• B. The weight would be the same, but the mass would be different.

• C. The weight and mass would both be different.

• D. The weight and mass would both be the same.

Once the students fill in the table, which statement would be correct?

• A. An object would weigh more on Saturn than on Earth.

• B. An object would be less massive on Mars than on Earth.

• C. An object would be more massive on Neptune than on Earth.

• D. An object would be exactly the same weight on Venus as on Earth.

A basketball moves in a straight path on a level surface. Which type of

frictional force does the basketball most likely encounter?

• A. static

• B. sliding

• C. rolling

• D. fluid

A force is applied to a cart on a carpeted floor. If the cart remains

stationary, which type of friction does the cart experience?

• A. static friction

• B. fluid friction

• C. sliding friction

• D. rolling friction

A worker pushes a box several meters across a carpeted floor. Which type

of frictional force exists between the box and the carpeted floor?

• A. fluid friction

• B. static friction

• C. rolling friction

• D. sliding friction

An eraser is moved across a board. Which type of friction exists between

the eraser and the board?

• A. static friction

• B. sliding friction

• C. rolling friction

• D. fluid friction