Kinetic energy is the energy of an object that is moving. It is calculated from one-half the product of the mass and the change in square of the velocity of the object. It is the opposite of potential energy which the energy possessed by an object at rest. We calculate as follows:
KE = mΔv^2 / 2 = 45 ( 6^2 - 12^2 ) = -4860 J had been lost by the skater
conduction because energy is being conducted throughout the spoon
Answer:
Explanation:
Loss of potential energy = mgh.
h = d sin 20
= 400 sin20 = 136.8 m
Loss of potential energy = m x 9.8 x 136.8
= 1340.64 m
negative work done by friction = μ mg cosθ x d
= .2 x m x 9.8 x cos 20 x 400
= 736.72 m
Net loss of potential energy = 1340.64 m - 736.72 m
= 603.92 m
= gain of kinetic energy = 1/2 m v²
1/2 m v² = 603.92 m
v² = 1207.84
v = 34.75 m /s .
False. Inertia and mass is not described in Newton’s second law of motion but in Newton’s first law of motion. Newton’s first law of motion or sometimes referred to as the law of inertia. In Newton’s first law indicates that an object at rest will remain at rest unless acted by an unbalanced force. An object in motion continues in motion with the same speed and in the same direction unless acted upon by an unbalanced force.
