A velocity-time graph is shown in the adjoining figure. Determine: (i) initial speed of the car

Given that, From the given graph we can see that at the time T = 0 velocity is zero. so, the initial speed of of the car is 0 m / s

A velocity-time graph is shown in the adjoining figure. Determine: (ii) maximum speed attained by the car

Given that, From the given graph, the initial velocity, u = 0 m / s Time, t = 3 sec The maximum speed attained by the car will fall under AB region. At v = 20 m / s It will have a maximum speed.

A velocity-time graph is shown in the adjoining figure. Determine: (iii) part of the graph showing zero acceleration

Given that, For zero acceleration, the slope of graph should be 0 In AB region slope is zero, so acceleration in AB region will be zero.

E M B I B E

Physics>Chapter 3 - Motion in a Plane>Exercises>Q 2

HARD

11th Maharashtra Board

IMPORTANT

Earn 100

Show that the path of a projectile is a parabola.

Important Questions on Motion in a Plane

HARD

11th Maharashtra Board

IMPORTANT

Physics>Chapter 3 - Motion in a Plane>Exercises>Q 2

What is a conical pendulum? Show that its time period is given by

2 π \sqrt{\frac{lcosθ}{g}}

, where

l

is the length of the string,

θ

is the angle that the string makes with the vertical and

g

is the acceleration due to gravity.

HARD

11th Maharashtra Board

IMPORTANT

Physics>Chapter 3 - Motion in a Plane>Exercises>Q 2

Define angular velocity. Derive an expression for centripetal force on a particle undergoing uniform circular motion.

MEDIUM

11th Maharashtra Board

IMPORTANT

Physics>Chapter 3 - Motion in a Plane>Exercises>Q 3

An airoplane has a run of

500 m

to takeoff from the runway. It starts from rest and moves with constant acceleration to cover the runway in

30 \sec

. What is the velocity of the airoplane at the takeoff?

HARD

11th Maharashtra Board

IMPORTANT

Physics>Chapter 3 - Motion in a Plane>Exercises>Q 3

A car moving along a straight road with a speed of

120 km / hr

, is brought to rest by applying brakes. The car covers a distance of

100 m

before it stops. Calculate (i) the average retardation of the car (ii) time taken by the car to come to rest.

MEDIUM

11th Maharashtra Board

IMPORTANT

Physics>Chapter 3 - Motion in a Plane>Exercises>Q 3

A car travels at a speed of

50 km / hr

for

30 minutes

, at

30 km / hr

for next

15 minutes

and then

70 km / hr

for next

45 minutes

. What is the average speed of the car?

EASY

11th Maharashtra Board

IMPORTANT

Physics>Chapter 3 - Motion in a Plane>Exercises>Q 3

A velocity-time graph is shown in the adjoining figure.

Question Image

Determine: (i) initial speed of the car

EASY

11th Maharashtra Board

IMPORTANT

Physics>Chapter 3 - Motion in a Plane>Exercises>Q 3

A velocity-time graph is shown in the adjoining figure.

Question Image

Determine: (ii) maximum speed attained by the car

EASY

11th Maharashtra Board

IMPORTANT

Physics>Chapter 3 - Motion in a Plane>Exercises>Q 3

A velocity-time graph is shown in the adjoining figure.

Question Image

Determine: (iii) part of the graph showing zero acceleration

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