answer is C. dressing to protect hands
Answer:
39.7 kJ
Explanation:
The kinetic energy formula applies:
KE = (1/2)mv^2 = (1/2)(633.0 kg)(11.2 m/s)^2 = 39,701.76 J
The kinetic energy is about 39.7 kJ.
Funny, I was just doing that in class today....the metre, unit of length, symbol m, the kilogram, unit of mass, symbol kg, the second, unit of time, symbol.
Answer: 4.03 m/s
Explanation: Kinetic energy is
KE = 1/2 m v²
So we derive the equation to have v.
v = √ 2KE / m
= 2 x 568 J / 70 kg
= 16.23
= √ 16.23
= 4.03 m/s
It is dependent upon the object's mass. The greater the mass of the object greater will be the inertia of the object, and hence it's resistance to change in motion as well.
