NDA PHYSICS QUIZ

Question 1:

Which of the following statement is incorrect?

The magnitude of a vector is always a scalar.

Each component of a vector is always a scalar.

The average speed of a particle is either greater or equal to the magnitude of average velocity of the particle over the same interval of time.

Three vectors not lying in a plane can never add up to give a null vector.

Question 2:

Which of the following is needed to change the direction of motion of an object.

Velocity

Mass

Acceleration

Force

Question 3:

Where should the handle be fixed to open a door easily?

Away from mid-point

Near the hinges

At mid-point

Anywhere near the mid-point

Question 4:

The motion of the wheels of bullock-cart while moving on the road is an example of –

Translational and rotational motion

Translational motion

Oscillatory motion

Oscillatory and translational motion

Question 5:

Which of the following statement is not correct?

The velocity vector of a particle at a point is always along the tangent to the path of the particle at that point.

The acceleration vector of a particle in uniform circular motion averaged over one cycle is a null vector.

The acceleration of an object in uniform circular motion is always directed towards the centre.

The acceleration of a particle in circular motion is always along the radius of the circle towards the centre.

Question 6:

A stone tied to the end of 80 cm long string is whirled in a horizontal circle with a constant speed. If the stone makes 14 revolutions in 25 s, what is the magnitude of acceleration of the stone?

9.90 m/s²

9.80 m/s²

9.55 m/s²

8.90 m/s²

Question 7:

Which of the following is the motion in which an object moves such that its distance from a fixed point remains the same?

Periodic motion

Circular motion

Rotational Motion

Rectilinear Motion

Question 8:

A cricketer can throw a ball to a maximum horizontal distance of 100 m. How much high above the ground can the cricketer throw the same ball?

45 m

50 m

55 m

40 m

Question 9:

A rope of negligible mass is wound round a hollow cylinder of mass 3 kg and radius 40 cm. What is the angular acceleration of the cylinder if the rope is pulled with a force of 30 N? Assume that there is no slipping.

20 rad/s²

25 rad/s²

30 rad/s²

35 rad/s²

Question 10:

At what angle should a javelin thrower throw the javelin to get the maximum possible distance from him?

45°

60°

50°

90°

NDA PHYSICS QUIZ - 21

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NDA PHYSICS QUIZ - 21

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