K.E is defined as dot product of:
Correct answer: B. Change of momentum and velocity
- A. Momentum and force
- B. Change of momentum and velocity
- C. Force and velocity
- D. All of these
Explanation
Option B is correct.The kinetic energy (KE) is also defined as the dot product of average momentum and velocity. The kinetic energy of an object is defined as the energy that it has due to its motion. The kinetic energy of an object is measured in joules. The formula for kinetic energy is:K.E = (1/2)mv² where:m is the mass of the objectv is the velocity of the objectWe know that momentum=p=mvPutting the value of momentum in the kinetic energy equation we get;K.E=1/2 (mv)v= 1/2 pv
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About Work and Energy
Work transfers energy when a force causes displacement, while kinetic energy, gravitational potential energy and power describe motion, position and the rate of energy transfer. The work-energy theorem links net work with change in kinetic energy, and efficiency accounts for energy losses rather than treating them as energy destruction.
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