NEETPhysicsLaws of MotionMCQ+4 / −1
A man weight 80 kg. He stands on a weighting scale in a lift which is moving upwards with a uniform acceleration of 5 m/s2. What would be the reading on the scale ? (g = 10 m/s2)
- Azero
- B400 N
- C800 N
- D1200 N
View written solutionFree
Correct answer: D
Reading of the scale = Apparent wt. of the man = m(g + a)
= 80 (10 + 5) = 1200 N
More from Laws of Motion
- A monkey of mass 20 kg is holding a vertical rope. The rope will not break when a mass of 25 kg is suspended from it but will break if the mass exceeds 25 kg. What is the maximum acceleration with which the monkey can climb up along the…2003 · MCQ
- A lift of mass 1000 kg which is moving with acceleration of 1 m/s2 in upward direction, then the tension developed in string which is connected to lift is2002 · MCQ
- A block of mass 10 kg placed on rough horizontal surface having coefficient of friction m = 0.5, if a horizontal force of 100 N acting on it then acceleration of the block will be2002 · MCQ
- An object of mass 3 kg is at rest. Now a force of = 6t2 + 4t is applied on the object then velocity of object at t = 3 sec. is2002 · MCQ
- 250 N force is required to raise 75 kg mass from a pulley. If rope is pulled 12 m then the load is lifted to 3 m. the efficiency of pulley system will be2001 · MCQ
- On the horizontal surface of a truck a block of mass 1 kg is placed (m = 0.6) and truck is moving with acceleration 5 m/sec2 then the frictional force on the block will be2001 · MCQ
- A cricketer catches a ball of mass 150 gm in 0.1 sec moving with speed 20 m/s, then he experiences force of2001 · MCQ
- A 1 kg stationary bomb is exploted in three parts having mass 1 : 1 : 3 respectively. Parts having same mass move in perpendicular direction with velocity 30 m/s, then the velocity of bigger part will be2001 · MCQ