8/10/2019 Chapter 2 Extension - Equations of Linear Motion

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8/10/2019 Chapter 2 Extension - Equations of Linear Motion

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PhysicsForm 4

Pusat Tuisyen Minda Inspirasi

Example 1

A skateboarder in a race is travelling at 10ms-1as he crosses the finishing line. He then

decelerates uniformly until coming to rest over a distance of 20m.

(a) What is his acceleration?

(b) How long does he take to come to rest?

Example 2

A driver accelerates his car from 20ms-1with an acceleration of 2ms-1. What is his velocity after

8 seconds?

Example 3

A rocket travelling at 2000ms-1increases its velocity to 6000ms-1after moving a distance of

80km. calculate the time for the rocket to reach this velocity.

8/10/2019 Chapter 2 Extension - Equations of Linear Motion

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Example 4

A sprinter reaches his top velocity in 3 seconds after starting from rest. He covers a

displacement of 24m in 3 seconds. What is his acceleration?

Example 5

By applying the brakes, a driver reduces his cars velocity from 20ms -1to 10ms-1after travelling

a distance of 30m. Find the deceleration of the car.

Example 6

Salina is driving her car at a velocity of 10ms-1. On seeing an obstacle in front, she applies the

brakes to stop her car. If the deceleration of the car is 2ms-1, what is the distance her car travels

before it comes to a halt?

8/10/2019 Chapter 2 Extension - Equations of Linear Motion

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PhysicsForm 4

Pusat Tuisyen Minda Inspirasi

Example 7

A sports car accelerates from rest and covers a distance of 90m in 6 seconds. What is its

acceleration?

Example 8

A cyclist starts from rest and reaches a velocity of 20ms-1in 8 seconds. Calculate its

acceleration.

Example 9

A dart leaves the barrel of a blow pipe of length 1.2m at a speed of 15ms-1. Find the time taken

for the dart to travel in the barrel.

8/10/2019 Chapter 2 Extension - Equations of Linear Motion

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PhysicsForm 4

Pusat Tuisyen Minda Inspirasi

Example 10

Daniel is driving his car at a constant velocity of 20ms -1. He steps on his brakes to reduce the

velocity of the car to 10ms-1after travelling 30m. Calculate the deceleration and the distance

travelled before the car stops.

Example 11

A light plane needs a velocity of 33ms-1for takeoff. If the plane can accelerate at 3ms-2,

calculate the minimum length of the runway for the plane to reach the proper speed to takeoff.

Example 12

A baseball pitcher holds a baseball in his hand for a distance of 3m before throwing the fastball

at a velocity of 39ms-1. Find the acceleration of the baseball before it is released.