Kinematics review

Heather and Matthew walk with an average velocity of 0.9800 m/s eastward. If it takes them 34.00 min to walk to the store, what is their displacement?

• 33.32m

• 1999m

• 37m

• 17m

It takes you 9.5 min to walk with an average velocity of 1.2 m/s to the north from the bus stop to the museum entrance. What is your displacement?

• 11.4m

• 684m

• 475m

• 37m

A scalar quantity has a magnitude and a vector quantity does not.

• True

• False

A vector quantity is described with a direction and a scalar is not.

• True

• False

Acceleration is a vector quantity.

• True

• False

Acceleration is the rate at which the position changes.

• True

• False

If an object has an acceleration of 0 m/s², then one can be sure that the object is not

• changing velocity.

• moving.

• at rest.

• changing position.

A car traveling at 22.4 m/s skids to a stop in 2.55 s. Determine the skidding distance of the car (assume uniform acceleration).

What number represents time?

• t = 2.55s

• t = 22.4m/s

• t= 0m/s

• t =?

A bike accelerates uniformly from rest to a speed of 7.10 m/s over a distance of 35.4 m. Which number represents initial velocity?

• v_i = 0 m/s

• v_i = 7.10 m/s

• v_i = 35.4 m/s

• v_i = 9.8 m/s

A _________ quantity is completely described by magnitude alone. A _________ quantity is
completely described by a magnitude with a direction.

• vector, scalar

• scalar, vector