Work, Power and EnergyHard
Question
A spring 40mm long is stretched by applying a force. If 10 N force is required to stretch the spring through one mm, then work done in stretching the spring through 40 mm is :
Options
A.24J
B.8 J
C.56 J
D.64 J
Solution
Force constant,
k =
= 104N/m
Work done =
kx2 = × 104 × 
= × 104 × 
= 8 joule
k =
= 104N/mWork done =
kx2 = × 104 × =
× 104 × = 8 jouleCreate a free account to view solution
View Solution FreeMore Work, Power and Energy Questions
A block of mass 0.50 kg is moving with a speed of 2.00 m/s on a smooth surface. It strikes another mass of 1.00 kg and t...A bomb of mass 9 kg explodes into two pieces of 3kg and 6 kg. The velocity of 3 kg piece is 16 m/s. The kinetic energy o...Under the action of a force, a 2 kg body moves such that its position x as a function of time is given by x = , where x ...A particle is moving in a circular path of radius a under the action of an attractive potential U = - k2r2. Its total en...One mole of an ideal gas expands adiabatically from T1 to temperature T2. Then work done by the gas is :-...