# CBSE Class 9 Physics Work and Energy

- define kinetic energy
- An elevator is designed to lift a load of 1000 kg with uniform velocity of 2m/s . Power of the elevator will be?
- if we increase kinetic energy by 20%, then find percentage increase in linear momentum
- a bus of mass 10000kg with a velocity of 90 km/h. calculate work done to stop the bus
- define kinetic energy
- what is kinetic energy
- Hi, my name is Aprameya i had a doubt we know K.E.(Kinetic Energy) = (1/2)mv^2 the v over here is velocity but at what time. Velocity will be different at differnt points of time i mean at 1second it might be something and and at another second it might be something else. so while calculating which velocity do we use
- what is energy
- A ball of mass 0.25kg is thrown upwards with a velocity of 10m/s at what height it's kinetic energy become 10J
- The water stored in dam can be used to generate electricity.give reason