Grade 9 Physics Diagnostic Test

An object is observed to have zero acceleration. Which of the following is correct?

• The object must be at rest.

• The object may be in motion

• The object must have zero net force.

• Both B and C are correct.

The figure shows the distance-time graph for a dog.

• The dog is speeding up

• The dog is not moving

• The dog is slowing down

• The dog has a constant speed

Which of forces on the diagram below represents frictional force?

• force A

• force B

• force C

• force D

The diagram below shows traces made by four different sounds.

• Sound A is louder than sound D

• Sound C has lower pitch than sound A

• Sound B has higher pitch than sound D

• Sound B has higher pitch than sound A

Which of the following has the largest kinetic energy?

• Mass 3M and speed V

• Mass 3M and speed 2V

• Mass 2M and speed 3V

• Mass M and speed 4V

If the force on an object is in the negative direction, the work it does on the object must be ________________.

• zero

• positive

• negative

• either positive or negative, depending on the direction the object moves

What type of energy is stored in a stretched spring?

• Kinetic energy

• Rest energy

• Elastic potential energy

• Chemical potential energy

A satellite is in orbit around the earth. Which one feels the greater force?

• the satellite because the earth is so much more massive

• the earth because the satellite has so little mass

• Earth and the satellite feel exactly the same force

• It depends on the distance of the satellite from Earth

The bending of light waves on a prism as shown below is called _____________________________.

• Reflection

• Refraction

• Dispersion

• Absorption

The diagram shows a ray of light hitting a plane mirror and bouncing back. Which of the following correctly represents the law of reflection?

• ∠𝑃=∠𝑄

• ∠𝑄=∠𝑅

• ∠𝑅=∠𝑆

• ∠𝑃=∠𝑆