Practice free Work Energy And Power (Physics) NEET multiple-choice questions online with instant answers and detailed explanations. No login required.
A car travelling at a speed of 30 km/h is brought to a halt in 8 metres by applying brakes. If the same car is travelling at 60 km/h it can be brought to a halt with the same breaking power in
Here distance $ d \alpha \nu^2 $ as $ \nu $ is doubled, d becomes 4 times.
An engine pumps water continuously through a hose water leares the hose with a velocity V and m is the mass per unit length of the water Jet what is the rate at which kinetic energy is imperted to water.
How much is the work done in pulling up a block of wood weighing 2KN for a length of 10m on a smooth plane inclined at an angle of 30o with the horizontal ?
$ W = Fd cos \theta $
A force of 7N, making an angle $ \theta $ with the horizantal, acting on an object displaces it by 0.5m along the horizontal direction. If the object gains K.E. of 2J, what is the horizontal component of the force ?
$ \triangle K = Fd cos \theta = w $
A 60 kg JATAN with 10 kg load on his head climbs 25 steps of 0.20m height each. what is the work done in climbing ? $ (g = 10 m/s^2) $
$ W = Fd = (mg) (d) ; where M = m_1 +m_2 $
A ball of mass 5 kg is stiding on a plane with intial velocity of 10 m/s. If co- efficient of friction between surface and ball is 1/2 then before stopping it will describe...... $ (g = 10 m/s^ 2) $
$ a = \mu g and v^2 = v_0^2 = -2 \mu gd $ $ \therefore d = { vo^2 \over 2 \mu g } $ (v = 0)
The force constant of a wire is K and that of the another wire is 3k when both the wires are stretched through same distance, if work done are $W_1 and W_2,$ then...
According $ W = { 1 \over 2 } kx^2 $
A ball is released from the top of a tower. what is the ratio of work done by force of
gravity in first, second and third second of the motion of the ball ?
$ [ h_n \alpha (2n-1) ] $
$ h_n \alpha (2n-1) $
A spring of spring constant $ 10 ^3 n/m $ is stretched initially 4cm from the unstretched position. How much the work required to stretched it further by another 5 cm ?
$ W = { 1 \over 2} k ( x_2 ^2 -x_1^2 ) $
The mass of a car is 1000 kg. How much work is required to be done on it to make it move with a speed of 36 km/h ?
According to work energy theorm $ W = \triangle k $
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The bank mixes NEET previous year questions (PYQs) with practice questions, each tagged with its exam appearances where applicable.