# Introduction To Kinematics

10 Questions  Settings  The following questions cover the content in Kinematics 1 (K1).

Questions and Answers
• 1.
Which of the following are vector quantities?
• A.

Speed

• B.

Displacement

• C.

Temperature

• D.

Energy

• 2.
A car accelerates from 20 i (m/s) to 50 i (m/s) in 5 seconds.
• A. 30 i (m/s)
• A.
• B. 35 i (m/s)
• B.
• C. 6 i (m/s/s)
• C.
• 3.
A car accelerates from -10 i (m/s) to -40 i (m/s) in 4 seconds. What is its displacement over this time?[Answer in the format: "8 j (m)" , "-20 i (m)". Do not include the quotation marks.]
• 4.
If an object is accelerating, then it must be speeding up.
• A.

True

• B.

False

• 5.
A car is driving south at 35 m/s. The driver applies the brakes, causing the car to slow at the rate of 5 m/s/s. What displacement will the car have in 3 seconds?[Answer in the format: "2.5 j (m)" , "-20.8 i (m)". Do not include the quotation marks.]
• 6.
If a bus has an acceleration of -3 i (m/s/s), then the bus is slowing down.
• A.

True

• B.

False

• 7.
A car is driving eastward, when the driver applies the brakes, reducing the car's speed at the rate of 3 m/s/s. The car's velocity is reduced to 5 m/s eastward over an eastward displacement of 50 m. What was the car's initial velocity? State your answer to the tenths place.[Answer in the format: "5.0 j (m/s)" , "-20.6 i (m/s)". Do not include the quotation marks.]
• 8.
A car's average speed can exceed its instantaneous speed.
• A.

True

• B.

False

• 9.
A bicyclist covers 20 meters at 2 m/s, then covers the next 20 meters at 8 m/s.What is her average speed over the 40 meters?
• A.

3.2 m/s

• B.

4.0 m/s

• C.

5.0 m/s

• 10.
Which of the following are accelerations?
• A.

20 i (m/s)

• B.

-3.5 j (m/s/s)

• C.

12 i (m/s/s)

• D.

4.2 i (m/s)