A car accelerates from rest to 28 m s - 1 in 9 . 0 s . Find the distance it travels.

Given that initial velocity is u = 0 m s - 1 and final velocity is v = 28 m s - 1 in a time of t = 9 . 0 s then let distance travelled by the car be ' s ' . w.k.t, from kinetic equations of motion a = v - u t = 28 - 0 9 = 28 9 m s - 2 and s = u t + 1 2 a t 2 ⇒ s = 0 × 9 + 1 2 × 28 9 × 9 2 = 126 m ∴ s = 126 m

HARD

Diploma

IMPORTANT

Earn 100

Draw the position-time graph for an object moving in a straight line with a velocity-time graph as shown below. The initial position is zero. You don't have to put any numbers on the axes.

Important Questions on Mechanics

HARD

Diploma

IMPORTANT

Physics for the IB Diploma 6th Edition>Chapter 2 - Mechanics>Test yourself>Q 3

Two cyclists, A and B, has displacements

0 km

and

70 km

, respectively. At t=0 they begin to cycle towards each other with velocities

15 km h^{- 1}

and

20 km h^{- 1}

, respectively. At the same time, a fly that was sitting on A starts flying towards B with a velocity of

30 km h^{- 1}

. As soon as the fly reaches B it immediately turns around and flies towards A, and so on until A and B meet.Find the position of the two cyclists and the fly when all three meet.

HARD

Diploma

IMPORTANT

Physics for the IB Diploma 6th Edition>Chapter 2 - Mechanics>Test yourself>Q 3

Two cyclists, A and B, has displacements

0 km

and

70 km

,respectively. At t=0 they begin to cycle towards each other with velocities

15 km h^{- 1}

and

20 km h^{- 1}

, respectively. At the same time, a fly that was sitting on A starts flying towards B with a velocity of

30 km h^{- 1}

. As soon as the fly reaches B it immediately turns around and flies towards A, and so on until A and B meet. Determine the distance travelled by the fly.

HARD

Diploma

IMPORTANT

Physics for the IB Diploma 6th Edition>Chapter 2 - Mechanics>Test yourself>Q 4

An object moving in a straight line has the displacement-time graph shown. Find the average speed for the trip.

Question Image

HARD

Diploma

IMPORTANT

Physics for the IB Diploma 6th Edition>Chapter 2 - Mechanics>Test yourself>Q 4

An object moving in a straight line has the displacement-time graph shown. Find the average velocity for the trip.

Question Image

MEDIUM

Diploma

IMPORTANT

Physics for the IB Diploma 6th Edition>Chapter 2 - Mechanics>Test yourself>Q 5

The initial velocity of a car moving on a straight road is

2.0 m s^{- 1}

. It becomes

8.0 m s^{- 1}

after travelling for

2.0 s

under constant acceleration. Find the acceleration.

HARD

Diploma

IMPORTANT

Physics for the IB Diploma 6th Edition>Chapter 2 - Mechanics>Test yourself>Q 6

A car accelerates from rest to

28 m s^{- 1}

9.0 s

. Find the distance it travels.

HARD

Diploma

IMPORTANT

Physics for the IB Diploma 6th Edition>Chapter 2 - Mechanics>Test yourself>Q 7

A particle has an initial velocity of

12 m s^{- 1}

and is brought to rest over a distance of

45 m

. Find the acceleration of the particle.

HARD

Diploma

IMPORTANT

Physics for the IB Diploma 6th Edition>Chapter 2 - Mechanics>Test yourself>Q 8

A particle at the origin has an initial velocity of

- 6.0 m s^{- 1}

and moves with an acceleration of

2.0 m s^{- 2}

. Determine when its position will become

16 m

Draw the position-time graph for an object moving in a straight line with a velocity-time graph as shown below. The initial position is zero. You don't have to put any numbers on the axes.

Important Questions on Mechanics

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