Скачать или смотреть Conceptual Questions | Physics 9th | Chapter 2 Kinematics | KPK Textbook Book, Peshawar | SLO Based

1. Encircle the best possible option.
The average speed of a bus is 20〖ms〗^(-1), how far can it travel in 10s?
(a) 100m (b) 200m (c) 150m (d) 250m
A truck accelerates uniformly from 15〖ms〗^(-1) to 20〖ms〗^(-1) in 5s. What is the acceleration of the truck?
(a) 2〖ms〗^(-2) (b) 1.5〖ms〗^(-2) (c) 1〖ms〗^(-2) (d) 2.5〖ms〗^(-2)
A car moving along a straight line at 20〖ms〗^(-1) under goes an acceleration of 4〖ms〗^(-2). After 2s, its speed will be
(a) 28〖ms〗^(-1) (b) 16〖ms〗^(-1) (c) 12〖ms〗^(-1) (d) 8〖ms〗^(-1)
A bird begins to accelerate at a constant 0.3〖ms〗^(-2) for 3s. Its change in velocity is
(a) 0.9〖ms〗^(-1) (b) 1.5〖ms〗^(-1) (c) 1.95〖ms〗^(-1) (d) 2.4〖ms〗^(-1)
A car is going backward at 5〖ms〗^(-1). After 10s of uninform acceleration, the car is going forward at 10〖ms〗^(-1). The acceleration is
(a) 0.5〖ms〗^(-2) (b) 0.75〖ms〗^(-2) (c) 1.5〖ms〗^(-2) (d) 5〖ms〗^(-2)
The slope of distance time graph represents:
(a) acceleration (b) change in acceleration (c) speed (d) distance
The area under a speed time graph represents:
(a) acceleration (b) change in acceleration (c) distance (d) velocity
A student riding his bicycle on a straight flat road covers one block every 7 seconds. If each block is 100m long, he is traveling at:
(a) constant seed (b) Constant velocity (c) 10〖ms〗^(-1) (d) Both A & B
You drop a rock from a bridge to the river below. When the rock has fallen 4m, you drop a second rock. As the rocks continue their free fall, their separation
(a) increase (b) decrease (c) stay the same (d) none
2. Give a brief response to the following questions
Is it possible that displacement is zero but not the distance? Under what condition displacement will be equal to distance?
Does a speedometer measure a car’s speed or velocity?
Is it possible for an object to be accelerating and at rest at the same time? Explain with example.
Can an object have zero acceleration and nonzero velocity at the same time? Give example.
A person standing on the roof of a building throws a rubber ball down with a velocity of 8.0〖ms〗^(-1). What is the acceleration (magnitude and direction) of the ball?
Describe a situation in which the speed of an object is constant while the velocity is not.
Can an object have a northward velocity and a southward acceleration? Explain.
As a freely falling object speeds up, what is happening to its acceleration? Does it increase, decrease or stay the same?
A ball is thrown upward with an initial speed of 5〖ms〗^(-1). What will be its speed when it returns to starting point?
Q4. Solve the following numerical questions.
A squash ball makes contact with a squash racket and changes velocity from 15〖ms〗^(-1) west to 25〖ms〗^(-1) east in 0.10s. Determine the vector acceleration of the squash ball.
A golf ball that is initially traveling at 25〖ms〗^(-1) hits a sand trap and slows down with an acceleration of -20〖ms〗^(-2). Find its displacement after 2.0s.
A bullet accelerates the length of the barrel of a gun 0.750m long with a magnitude of 5.35×〖10〗^5 〖ms〗^(-2). With what speed does the bullet exit the barrel?
A driver is traveling at 18〖ms〗^(-1) when she sees a red light ahead. Her car is capable of decelerating at a rate of 3.65〖ms〗^(-2). If she applies brakes when she is only 20.0m from the intersection when she sees the light, will she be able to stop in time.
An antelope moving with constant acceleration 2〖ms〗^(-1) covers crosses a point where its velocity is 5〖ms〗^(-1). After 6.00s how much distance it has covered and what is its velocity?
With what speed must a ball be thrown vertically from ground level to rise to a maximum height of 50m?