Motion in a Plane

The range of a projectile depends on:

1. Initial velocity and angle of projection
2. Only mass of projectile
3. Only height of projectile
4. Shape of projectile only

A scalar quantity among the following is:

1. Velocity
2. Displacement
3. Acceleration
4. Speed

The formula for centripetal acceleration is:

1. a = v²/r
2. a = vr
3. a = r/v²
4. a = v/r²

The angle between velocity and acceleration in uniform circular motion is:

1. 0°
2. 45°
3. 90°
4. 180°

The velocity of an object moving in a circular path is:

1. Always constant
2. Always zero
3. Changing continuously
4. Independent of direction

The maximum range of a projectile is obtained when the angle of projection is:

1. 30°
2. 45°
3. 60°
4. 90°

The acceleration due to gravity acts:

1. Horizontally
2. Vertically downward
3. Along the direction of motion
4. Opposite to displacement always

The path followed by a projectile is:

1. Circular
2. Straight line
3. Parabolic
4. Elliptical

The acceleration of a projectile in the horizontal direction is:

1. g
2. Zero
3. Maximum
4. Variable

The motion of a projectile is an example of:

1. One-dimensional motion
2. Two-dimensional motion
3. Circular motion only
4. Random motion

The SI unit of displacement is:

1. metre
2. metre/second
3. kilometre
4. second

The horizontal and vertical components of a vector A making an angle θ with the x-axis are:

1. A cos θ and A sin θ
2. A sin θ and A cos θ
3. A and θ
4. A + θ and A - θ

The magnitude of a unit vector is:

1. 0
2. 1
3. Infinite
4. Depends on direction

The resultant of two vectors is maximum when the angle between them is:

1. 0°
2. 45°
3. 90°
4. 180°

A quantity that has both magnitude and direction is called:

1. Scalar quantity
2. Vector quantity
3. Physical constant
4. Dimensionless quantity