Physics-

General

Easy

Question

# A particle starts from rest. Its acceleration time is as shown in the figure. The maximum speed of the particle will be

## The correct answer is:

### Area under acceleration-time graph gives the change in velocity. Hence,

Therefore, the correct option is [b].

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### In figure, one car at rest and velocity of the light from head light is , tehn velocity of light from head light for the moving car at velocity , would be

Since (negligible)

### In figure, one car at rest and velocity of the light from head light is , tehn velocity of light from head light for the moving car at velocity , would be

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### A cyclist starts from the centre of a circular park of radius 1 km, reaches the edge of the park, then cycles along the circumference and returns to the point as shown in figure. If the round trip takes 10 min, the net displacement and average speed of the cyclist (in metre and kilometer per hour) are

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Distance travelled by car at s

=(18)(60)=720 m

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Therefore, separation between them at s is 180m. Let, separation between them decreases to zero at time beyond 18s.

Hence, and

s beyond 18s or

Hence, s=27s from start and distant travelled by both is =m

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physics-General

Distance travelled by motor bike at s

(18)(60)=540 m

Distance travelled by car at s

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Therefore, separation between them at s is 180m. Let, separation between them decreases to zero at time beyond 18s.

Hence, and

s beyond 18s or

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Reason : They have large number of rods on their retina.

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Owls can move freely during night, because they have large number of cones on their retina which help them to see in night.

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Instantaneous velocity is given by the slope of the curve at that instant from the figure it is clear that slope of the curve is maximum at point ‘’

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### For the velocity-time graph shown in figure below the distance covered by the body in last two seconds of its motion is what fraction of the total distance covered by it in all the seven seconds

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### A particle starts from rest at and undergoes an acceleration in with time in second which is as shownWhich one of the following plot represents velocity in time in second?

A particle starts from rest at

The equation of motion

The velocity for next 2 s

Hence, graph will be as shown.

The equation of motion

The velocity for next 2 s

Hence, graph will be as shown.

### A particle starts from rest at and undergoes an acceleration in with time in second which is as shownWhich one of the following plot represents velocity in time in second?

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A particle starts from rest at

The equation of motion

The velocity for next 2 s

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The equation of motion

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and

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and

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.This equation is of parabola

and

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### A body is at rest at . At , it starts moving in the positive -direction with a constant acceleration. At the same instant another body passes through moving in the positive -direction with a constant speed. The position of the first body is given by after time ‘’ and that of the second body by after the same time interval. Which of the following graphs correctly describes as a function of time ‘’

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and

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General solution of is

General solution of is

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