Q.1 An elevator is moving upwards with constant velocity of ‘v’. What is a weight of a person of a mass ‘m’ inside the elevator during upward motion?
A) mg + mv C) mg ― mv
B) mg D) zero
A) mg + mv C) mg ― mv
B) mg D) zero
Q.4 An object of mass ‘m’ is suspended in an elevator moving downward with acceleration equal to acceleration due to gravity. What is the apparent weight of object?
A) Zero C) mg
B) 2mg D)mg/2
A) Zero C) mg
B) 2mg D)mg/2
Q.5 Ratio of moment of inertia of two objects 'A' and 'B' is 2:3. Which one of the following is the ratio of torques of 'A' and 'B' respectively, if both are being rotated with constant angular acceleration?
A) 3:4 C) 3:2
B) 2:3 D) 4:3
Q.6 Due to some mechanical fault, a lift falls freely from the top of a multistory building. Which of the followings is the apparent weight of a man inside the lift, if mass of man is 80 kg while value of 'g' is 10 ms2?
A) 900 N C) 800 N
B) Zero D) 700 N
A) 3:4 C) 3:2
B) 2:3 D) 4:3
Q.6 Due to some mechanical fault, a lift falls freely from the top of a multistory building. Which of the followings is the apparent weight of a man inside the lift, if mass of man is 80 kg while value of 'g' is 10 ms2?
A) 900 N C) 800 N
B) Zero D) 700 N
Q. 10 A body is having weight 20 N, when the elevator is descended with a = 0.1 ms2, then the value of tension ‘T’ is:
A) 196 N C) 1.98 N
C) 19.8 N D) 2 N
A) 196 N C) 1.98 N
C) 19.8 N D) 2 N
Q.11 A man in elevator ascending with an acceleration will conclude that his weight is:
A) Increased C) Reduced to zero
B) Decreased D) Remain Constant
Q.12 If we double the moment arm the value of torque becomes:
A) Half C) Two-times
B) Three-times D) Four-times
A) Increased C) Reduced to zero
B) Decreased D) Remain Constant
Q.12 If we double the moment arm the value of torque becomes:
A) Half C) Two-times
B) Three-times D) Four-times