Matter In Motion Test

Any change in position over time is an example of______________________.

• motion

• gravity

• acceleration

• velocity

• force

Answer explanation

Any change in position over time is defined as motion. The other options like gravity, acceleration, velocity, and force relate to motion but do not describe the change in position itself.

The newton is the SI unit of ______________________.

• force

• weight

• motion

• gravity

• acceleration

Answer explanation

The newton is the SI unit of force, which is defined as mass times acceleration. Weight is the force exerted by gravity on an object. Therefore, both force and weight are correct answers.

The speed of an object in a particular direction is _____________________.

• velocity

• motion

• gravity

• acceleration

• force

Answer explanation

The speed of an object in a particular direction is defined as velocity. Unlike speed, which is a scalar quantity, velocity includes both magnitude and direction, making it the correct term for this description.

A force that always acts to oppose motion is ______________________.

• friction

• motion

• gravity

• acceleration

• velocity

Answer explanation

A force that always acts to oppose motion is friction. It resists the relative motion between surfaces in contact, making it the correct answer.

An object’s ______________________ can change with its location.

• gravity

• acceleration

• velocity

• weight

• speed

Answer explanation

An object's weight, velocity, acceleration, and speed can vary based on its location due to factors like gravity. For example, weight changes with gravitational pull, while velocity and speed depend on motion relative to a reference point.

Which of these is an example of acceleration?

• Speeding Up

• Slowing Down

• Changing Direction

• All of these

Answer explanation

Acceleration refers to any change in velocity, which includes speeding up, slowing down, and changing direction. Therefore, the correct answer is 'All of these' as they all represent forms of acceleration.

What is an object that appears to stay in place that helps you detect motion in another object?

• Newton

• Black Hole

• Reference point

• Lubricant

Answer explanation

A reference point is an object that remains stationary and allows you to observe the motion of another object relative to it. This makes it essential for detecting and measuring motion.

Which point has the fastest speed?

• A

• B

• C

• D

Answer explanation

Point C has the fastest speed among the options provided, indicating it has the highest velocity compared to points A, B, and D.

Which is an example of friction that is helpful?

• friction that causes engine parts to wear out

• friction between car tires and the road that moves a car forward

• friction that wears holes in your socks

• wind causing soil erosion

Answer explanation

Friction between car tires and the road is helpful because it provides the necessary grip for the tires to move the car forward, enabling acceleration and safe handling. This is a positive use of friction.

A force of attraction between two masses is ______________.

• Net force

• Speed

• Velocity

• Gravity

Answer explanation

A force of attraction between two masses is known as gravity. It is the fundamental force that pulls objects toward each other, depending on their masses and the distance between them.