Questions by varun

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If a running bus stops suddenly, our feet stop due to friction, but the rest of the body continues to move forward due

asked Mar 19, 2022 in 11th Physics

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Suppose the earth suddenly stops attracting objects placed near surface. A person standing on the surface of the earth

asked Mar 19, 2022 in 11th Physics

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When a car is stationary, there is no net force acting on it. During pick-up, it accelerates. This happens due

asked Mar 19, 2022 in 11th Physics

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A smaller and a bigger iron balls are dropped from a small height on a glass pane placed on a table. Only bigger ball breakes the glass pane,

asked Mar 19, 2022 in 11th Physics

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A rocket is going upwards with accelerated motion. A man sitting in it feels his weight increased 5 times his own weight. If the mass of the rocket including that of the man is `1.0 xx 10^4 kg`, how much force is being applied by rocket engine? (Take, `g = 10

asked Mar 19, 2022 in 11th Physics

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The motion of a particle of mass m is described by `y=ut + gt^2`, find the force acting on the

asked Mar 19, 2022 in 11th Physics

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A bullet of mass `0.04 kg` moving with a speed of `90 ms^(-1)` enters a heavy wooden block and stopped after `3s`. What is the average resistive force exerted by the block on the

asked Mar 19, 2022 in 11th Physics

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A body of mass `6 kg` is acted on by a force so that its velocity changes from `3 ms^(-1)` to `5 ms^(-1)`, then change in momentum

asked Mar 19, 2022 in 11th Physics

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While launching a satellite of mass `10^4 kg,` a force of `5 xx 10^5 N` is applied for `20s`. The velocity attained by the satellite at the end of `20s,`

asked Mar 19, 2022 in 11th Physics

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The momentum p (in `kg-ms^(-1)`) of a particle is varying with time t (in second) as `p= 2 + 3t^2`.The force acting on the particle at `t=3 s` will

asked Mar 19, 2022 in 11th Physics

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A machine gun fires a bullet of mass `40 g` with a velocity of `1200 ms^(-1)`. The man holding it can exert a maximum force of `144 N` on the gun.How many bullets can be fired per second at the

asked Mar 19, 2022 in 11th Physics

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The force `F` acting on a particle of mass `m` is indicated by the force-time graph shown below. The change in momentum of the particle over the time interval from `0` to `8s`

asked Mar 19, 2022 in 11th Physics

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A particle of mass `m` is moving in a straight line with momentum `p`. Starting at time `t = 0`, a force `F= kt` acts in the same direction on the moving particle during time interval `T,` so that its momentum changes from `p` to `3p`. Here, `k` is a constant. The value of `T`

asked Mar 19, 2022 in 11th Physics

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A constant retarding force of `50 N` is applied to a body of mass `20 kg` moving initially with a speed of `15 ms^(-1)`. How long time does the body take to

asked Mar 19, 2022 in 11th Physics

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A batsman hits back at ball straight in the direction of the bowler without changing its initial speed of `12ms^(-1)`. If the mass of the ball is 0.15 kg, find the impulse imparted to the ball. (Assume linear motion of the

asked Mar 19, 2022 in 11th Physics

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The force-time (F -t) graph for linear motion of a body initially at rest is shown in figure. The segments shown are circular, the linear momentum gained in `4 s`

asked Mar 19, 2022 in 11th Physics

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Every action has an equal and opposite reaction, which suggests

asked Mar 19, 2022 in 11th Physics

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An initially stationary device lying on a frictionless floor explodes into two pieces and slides across the floor. One piece is moving in positive `x`-direction then other piece is moving

asked Mar 19, 2022 in 11th Physics

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A shell of mass 200 g is fired by a gun of mass 100 kg. If the muzzle speed of the shell is 80 m/s, calculate the recoil speed of the

asked Mar 19, 2022 in 11th Physics

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In equilibrium of particle when net external force of the particle is zero. Then, the particle

asked Mar 19, 2022 in 11th Physics

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