Vectors & Graphs

Which of the following is a vector?

• distance

• speed

• position

• none of the others

An object starts at rest and accelerates at a rate of 5 m/s² [E]. What is its velocity after 2 s?

• –5 m/s [E]

• –10 m/s [E]

• 10 m/s [E]

• 5 m/s [E]

The dots show the position of an object and were made at equal time intervals. In which direction is the object decelerating?

• up

• down

• there is no way to determine

The area under an a-t graph gives you the…

• change in position

• change in velocity

• change in acceleration

• none of the others

A non-zero slope on a v-t graph represents

• uniform motion

• acceleration

• zero movement

An object is travelling at 2 m/s [N]. The object comes to rest in 1 second. What is the object’s acceleration?

• 2 m/s² [N]

• –2 m/s² [S]

• 2 m/s² [S]

• 1 m/s² [S]

• 0.5 m/s² [N]

For an object that can travel in only one direction, which of the following is true?

• The average velocity is always less than or equal to the instantaneous velocity.

• The average velocity is always greater than or equal to the instantaneous velocity.

• The average velocity is always the same the instantaneous velocity.

• None of the others.

Airplane A is flying straight. Airplane B is directly above and flying at the same speed as Airplane A while ascending (going up). Are the airplanes in motion relative to each other?

• Yes

• No

In what direction is the object moving in part C?

• North

• South

• North-East

• South-East

A rocket begins at rest and reaches a speed of 14.65 m/s in 4 seconds. What is the average acceleration of the rocket with the correct number of significant figures?

• 3 m/s²

• 3.663 m/s²

• 3.6 m/s²

• 4 m/s²