A body of mass 2 kg travels according to the law x(t)=pt+qt²+rt³
A body of mass 2 kg travels according to the law x(t)=pt+qt²+rt³,where p=3 m/s,q=4 m/s² and r=5 m/s³.The force acting on the body at t=2 s is
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(a) 136 N (b) 134 […]
Physics
In the diagram shown in figure, match the following about weight
In the diagram shown in figure,match the following (take, g=10 m/s²) Column I Column II A. Acceleration of 2kg block 1.8 SI unit B. Net force on 3 kg block 2.25 SI unit C. Normal […]
Four blocks of same mass connected by cords are pulled by a force F
Four blocks of same mass connected by cords are pulled by a force F on a smooth horizontal surface, as shown in the figure.The tensions T₁,T₂ and T₃ will be
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(a) T₁=1/4F,T₂=3/2F, […]
An open knife edge of mass 200g is dropped from height 5m on a cardboard
An open knife edge of mass 200g is dropped from height 5m on a cardboard. If the knife edge penetrates distance 2m into the cardboard, the average resistance offered by the cardboard to the knife […]
A lift is moving down with acceleration a.A man in the lift drops a ball
A lift is moving down with acceleration a. A man in the lift drops a ball inside the lift.The acceleration of the ball as observed by the man in the lift and a man standing […]
A disc of mass 100 g is kept floating horizontally in air by firing bullets
A disc of mass 100 g is kept floating horizontally in air by firing bullets, each of mass 5g with the same velocity at the same rate of 10 bullets/s.The bullets rebound with the same […]
Two blocks of masses m₁=4 kg and m₂= 2kg are connected to the ends of a string
Two blocks of masses m₁=4 kg and m₂= 2kg are connected to the ends of a string which passes over a massless,frictionless pulley.The total downward thrust on the pulley is nearly
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(a) […]
The minimum velocity (in ms⁻¹) with which a car driver must traverse a flat curve
The minimum velocity (in ms⁻¹) with which a car driver must traverse a flat curve of radius 150 m and coefficient of friction 0.6 to avoid skidding is
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(a) 60 ms⁻¹ (b) […]
You are marooned on a frictionless horizontal plane and cannot exert any horizontal
You are marooned on a frictionless horizontal plane and cannot exert any horizontal force by pushing against the surface.How can you get off
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(a) by jumping (b) by rolling your body on […]
A body with mass 5 kg is acted upon a force F=(-3i+4j) N.If its initial velocity at
A body with mass 5 kg is acted upon a force F=(-3i+4j) N.If its initial velocity at t=0 is v=(6i-12j)m/s.The time at which it will just have a velocity along the y-axis is
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