1 : A force F is making an angle of 60° with x-axis. Its y-component is equal to:
1 : F
2 : Fsin60°
3 : Fcos60°
4 : Ftan60°
2 : In stable equilibrium, the centre of gravity of the body lies:
1 : at the highest position
2 : at the lowest position
3 : at any position
4 : may lie within, outside or on the surface
3 : The centre of mass of a body:
1 : lies always inside the body
2 : lies always outside the body
3 : lies always on the surface of the body
4 : outside the body
4 : A man walks on a tight rope. He balances himself by holding a bamboo stick horizontally. It is an application of:
1 : law of conservation of momentum
2 : Newton's second law of motion
3 : principle of moments
4 : Newton's third law of motion
5 : A cylinder resting on its circular base is in:
1 : stable equilibrium
2 : neutral equilibrium
3 : unstable equilibrium
4 : none of these
6 : Moment of force is called:
1 : moment arm
2 : couple
3 : couple arm
4 : torque
7 : Centripetal force is given by:
1 : rF
2 : rFcosθ
3 : mv²/r
4 : my
8 : A shopkeeper sells his articles by a balance having unequal arms of the pans. If he puts the weights in the pan having shorter arm, then the customer:
1 : loses
2 : gains
3 : neither loses nor gains
4 : not certain
9 : If F₁ and F₂ are the forces acting on a body and τ is the torque produced in it, the body will be completely in equilibrium when:
1 : ΣF=0 and Στ=0
2 : ΣF=0 and Στ≠0
3 : ΣF≠0 and Στ=0
4 : F≠0 and Στ≠0
10 : A particle is simultaneously acted upon by two forces of 4 and 3 newtons. The net force on the particle is:
1 : 1 N
2 : between 1 N and 7 N
3 : 5 N
4 : 7 N
11 : A body is said to be in equilibrium if :
1 : It is moving with a constant acceleration
2 : It is moving with a uniform velocity
3 : It is at rest
12 : Where is correct of gravity of a square located?
1 : At is the center
2 : At one of the covers
3 : On one of the sides
4 : It depend on the density
13 : What is the resultant force on a body in equilibrium?
1 : Equal to the weight of body
2 : Zero
3 : None of above
4 : Equal to the mass of body
14 : What a happen to the stability of an object when its center of gravity in lowered?
1 : It becomes less stable
2 : It becomes more stable
3 : At remain the same
4 : It becomes unstable
15 : Which of the following is not a counter part of a quality in translational motion in rotational motion?
1 : Velocity
2 : Acceleration
3 : Momentum
4 : Energy
16 : What is the key principle behind resolving a force into its components?
1 : The principle of superposition
2 : The Pythagorean theorem
3 : Newton’s third law
4 : The Pythagorean theorem
17 : What is a component of a vector?
1 : The direction of the water
2 : the magnitude of the vector
3 : the effective value of the vector in a specific direction
4 : the change in vector over time
18 : Which of the following factors affects the moment of force?
1 : Magnitude of the force
2 : Distance from the point rotation
3 : Angle of force
4 : All of the above
19 : They head to tail rule is used to :
1 : Calculate the magnitude of a force
2 : Debarment the direction of a force
3 : Find the resultant of multiply forces
4 : Measure the angle between to forces
20 : In a balanced system, what is the net moment about any point?
1 : Position
2 : Negative
3 : Zero
4 : Cannot be determined
21 : Which of the following is not a characteristics of parallel forced:
1 : They act along the same line
2 : They always have the same magnitude
3 : They can be added using head to tail rule
22 : Which of the following is not a source of a central force?
1 : Gravity
2 : Friction
3 : tension
4 : electrical force
23 : What happen to the centripetal force if the radius of the circular path is increased while beeping the speed constant?
1 : The centrepitation fore increase
2 : the centripetal force decrease
3 : the centripetal force remains same
4 : the centripetal force becomes zero
24 : Which of the following best describe the first condition of equilibrium?
1 : The sum of all the forces is greater than zero
2 : The sum of all torques is greater than zero
3 : The sum of all torques is greater than zero
4 : The object is in motion
25 : What is the primary factor that influence the stability an object?
