4) A spring is compressed stored 1000 j of potential energy in it.Two identical masses of 1 kg each are on either of side the spring.What is the velocity of the two balls after the spring is released?
5) A 2Kg mass is pushed with 10N of force and has 1N of friction opposing its motion.If it starts from rest how fast is it moving after 2s?
6)A wheel on a robot has a radius of0.2m and is rotating at 3rad/s. How far did it roll during 4s?
7) A 100kg crate is pushed on a flat surface with how much force before it starts to move assuming us=0.8?
4) U = 2*0.5*m*v^2
==> v = sqrt(U/m)
= sqrt(1000/1)
= 31.62 m/s
5) impulse = (10-1)*2 = 18 N/s
impulse = chnage in momentum
m*v = 18
v = 18/2 = 9 m/s
6) v = r*w = 0.2*3 = 0.6 m/s
d = v*t = 0.6*4 = 2.4 m
7) F = mue*m*g = 0.8*100*9.8 = 784 N
4) A spring is compressed stored 1000 j of potential energy in it.Two identical masses of...
The elastic potential energy stored in a certain spring is 14.5 J when it is compressed 0.220 m. The spring is now cut into two equal pieces. One of the pieces is then compressed by 0.160 m. How much elastic potential energy is stored in the compressed piece? a)3.83 J b) 29.0 J c) 47.9 J d)7.25 J e) 15.3 J
1. Power is a quantity Watts. 2. 1 hp is equal to 3. Energy is neither created nor destroyed, only determine the work done on an object, the angle 0, is measured between the Force and the 5. The SI units for Power are 6. Another name for the unit of Work, which is a N m, is called 7. Work done on an object slowing down is 8. Yo u push a lawn mower 6 times as far as...