The velocity of a moving body, is

 

(A) a vector quantity

 

(B) a scalar quantity

 

(C) a scalar as well as a vector quantity

 

(D) none of these

Two forces act an angle of 120°. If the greater force is 50 kg and their resultant is perpendicular to the smaller force, the smaller force is

(A) 10 kg

(B) 20 kg

(C) 25 kg

(D) 35 kg

The motion of a bicycle wheel is

(A) curvilinear

(B) translatory

(C) rotary

(D) rotary and translatory

Work may be defined as

(A) force x acceleration

(B) force x velocity

(C) force x distance

(D) none of these

A geo-stationary satellite is one which orbits the earth with a velocity of rotation of

(A) pole

(B) sun

(C) earth

(D) moon

For a body moving with simple harmonic motion, the number of cycles per second, is known as its

(A) oscillation

(B) frequency

(C) periodic time

(D) amplitude

The path traced by a projectile in the sky, is

(A) parabolic

(B) elliptical

(C) straight line

(D) circular

The product of mass and velocity of a moving a body is called

(A) impulse

(B) power

(C) moment

(D) momentum

A retarding force on a body does not

(A) introduce the motion of the body

(B) retard the motion of the body

(C) change the motion of the body

(D) none of these

The units of inertia of mass, are

(A) kg/m

(B) kg/m2

(C) kg-m2

(D) m4

Kinetic friction may be defined as

(A) friction force acting when the body is just about to move

(B) ratio of limiting friction and normal reaction

(C) angle between normal reaction and resultant of normal reaction and limiting friction

(D) friction force acting when the body is in motion