physics

What is the SI unit of time?

• Seocnd

• Minute

• Hour

• Day

An action exerted on an object which may change the object’s state of rest or motion defines

• a. Acceleration

• b.Force

• c. Mass

• d. Velocity

The gravitational force exerted on an object would most likely be represented by which force vector?

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Units that measure weight are units of

• a. Acceleration

• b. Force

• c. Mass

• d. Velocity

A force unit is defined as the product of a mass unit and a unit of?

• a. Time

• b. Displacement

• c. Velocity

• d. Acceleration

Which of the following forces is an example of a contact force?

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As an object falls toward Earth,

• the object does not exert a force on Earth.

• the object exerts a downward force on Earth.

• Newton’s third law does not apply.

• the upward acceleration of Earth is negligible because of its large mass.

Which of the following forces is an example of a field force?

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Which of the following sentences uses work in the scientific sense?

• Ahmad goes to work on the bus.

• Maryam did work on the project for 5 hours.

• Abdullah found that holding the banner in place was hard work.

• An engine does work on a car when the car is moving.

. In the free-body diagram shown above, which of the following is the gravitational force acting on the balloon?

• 1520 N

• 950N

• 4050N

• 5120N