Question # 1

Which quantity has different units from the other three.

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Density x volume x velocity

Rate of change of momentum

Young's modulus x area

Weight

If the roads are not banked

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A vehicle will turn over

A vehicle will not travel along with curve

Tyres and bearing are damaged

Roads will be spoiled

While passing through the atmosphere total energy is reduced due to.

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scattering

Absorption

Reflection

All of these

A car is travelling with uniform acceleration the road has check posts every 100 m When the car passes one post , it has a speed of 10 m s-1 and when passes the next one its speed is 20 ms-1 What is the cars acceleration.

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0.67 m s-2

1.5 m s2

2.5 m s-2

6.0 m s-2

Which of the following is not an elastic collision

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A man jumps on a cart

A bullet embedded in a block

Colliding of two glass balls

Colliding of two tennis balls

A body attached to a spring is pulled to a distance of 20 cm If the value of spring constant is 48 N m-1, the amount of force applied will be.

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4.8 N

9.6 N

96 N

192 N

The 1st condition of equilibriums satisfied if.

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Linear acceleration is zero

Angular acceleration is zero

The vector sum of all the forces is zero

The vector sum of all the torque is increase

For maximum range angle of projection of the projectile should be

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45 ^o

90^o

120 ^o

180 ^o

A particle performs SHM of amplitude 0.020 and frequency 2.5 Hz. What is its maximum speed.

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0.050 m s-1

0.125 m s-1

0.314 m s-1

0.75 m s-1

Which vector can be used to locate the centre of mass of a collection of particles.

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Null vector

Unit vector

Position vector

Distance vector

A body of mass 8 kg moves along a circle of radius 4 m with constant speed of 88 m s-1 The centripetal force on the body is.

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10 N

128 N

48 N

148 N

By decreasing angle between two vectors their cross product.

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Increases

Decreases

Remains the same

Vanishes

The product of force and duration of impact is called.

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Density

Momentum

Torque

Impulse

If average acceleration is equal to instantaneous acceleration then the body's said to be moving.

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Negative acceleration

Positive acceleration

uniform acceleration

Variable acceleration

Original source of biomass is.

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Stars

Moon

earth

Sun

A car is travelling on a level highway at at speed of 15 m s-1. A braking force of 3,000 N brings the car to stop in 10 s The mass of the car is.

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1500 kg

2,000 kg

2,500 kg

3,000 kg

If the presence of air friction, the path of a projectile appears as.

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Straight line

Parabola

Hyperbola

zig zag

When a force of 16 N acts on a mass of 4 kg for a time of 4 s. What is the rate of change of momentum.

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1 kg m s-2

4 kg m s-2

8 kg m s-2

16 kg m s-2

Which of the following statement is correct for a particle moving in a horizontal circle with constant angular velocity.

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The linear momentum is constant but the K.E. varies

The K.E. is constant but the linear momentum varies

Both K.E. and linear momentum are constant

Both speed and linear velocity are constant.

A fixed pulley is emplyed to

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Do some work

Change the directionof force

Do more work with the same force but without using the pulling

Have mechanical advantage greater than 1

A body is in a static equilibrium, only when it is

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Moving with uniform velocity

Moving with variable velocity

Moving with uniform acceleration

at rest

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