PHSI191-5-theory1

Churner

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Which of the following is a vector quantity?

Displacement

Distance

Time

Speed

None

If an object moves with an acceleration of 2 m/s², what does it mean?

The object moves with a uniform velocity

The object’s speed increases by 2 m/s every meter it travels.

The object’s speed remains constant

The object’s speed increases by 2 m/s every second

None

Which of the following correctly defines displacement?

The time taken for an object to move from one place to another

The rate at which an object moves

The total path length covered by an object

The shortest straight-line distance from the initial to the final position

None

What is the definition of kinematics?

The study of energy and work in a system

The study of mechanics

The study of motion without considering its causes

The study of forces acting on an object

None

If an object moves with a constant velocity, what can be said about its acceleration?

It is decreasing

It is increasing

It is constantly accelerating

It is zero

None

What is the equation for calculating average speed?

Total velocity ÷ total time

(Initial velocity + Final velocity) / 4

Total distance ÷ total time

Final velocity - Initial velocity

None

What is the velocity of a body that has been falling freely under gravity for 3 seconds?

19.6 m/s

9.8 m/s

24.5 m/s

29.4 m/s

None

A car accelerates uniformly from 5 m/s to 15 m/s in 5 seconds. What is its acceleration?

7 m/s²

2 m/s²

1 m/s²

5 m/s²

None

What happens to an object in free fall in the absence of air resistance?

It falls at a constant velocity

It accelerates at 9.8 m/s² upward

It accelerates at 9.8 m/s² downward

Its acceleration decreases over time

None

10.

If a car moves at a constant speed of 20 m/s for 10 seconds, how far does it travel?

200 m

150 m

20m

100 m

None

Time's up