Answer:
K.E is 2.25 J
Explanation:
Data :
Mass = m = 0.5 kg
Velocity = v = 3 m/s
Formula for K.E
K.E = 1/2mv²
Put values
K.E = 1/2(0.5)(3)² = 2.25 J
Answer:
it prevents slipping on the grass while playing
Quisiera ayudarte pero no puedo apenas voy a pasar a secundaria :(
Supposing these are the choices,
a. taking in a greater amount of energy than is released by the body
b. taking in a lesser amount of energy than is released by the body
c. balancing the amount of energy that is taken in with the amount of energy that is released by the body
<span>
d. none of the above
If we assume they are talking about a person who is with in an ideal body weight range than
c. is the correct answer.
Answer A will make you gain weight, B will make lose weight.
To fully complete the answer we would have to assume that the person has moderate exercise in their life style to maintain muscle mass.</span><u />
Weight = (mass) x (acceleration of gravity).
When I calculate the weight of the 81.6 kg, the number I use for gravity
is 9.807 m/s². That gives a weight of 800.25 N, so I think that's where the
question got the crazy number of 81.6 kg ... whoever wrote the problem
wants the hay to weigh 800 N, and that's what I'll use for the weight.
The forces on the bale of hay are gravity: 800N downward, and the
guy on the truck with the pitchfork pulling upward on it with 850 N.
The net force on the bale is (850 - 800) = 50 N upward.
Use Newton's second law of motion: (Net force) = (mass) x (acceleration)
Divide each side by 'mass' :
Acceleration = (net force)/(mass)
On the hay wagon,
Acceleration = (50 N upward) / (81.6 kg) = <em>0.613 m/s² upward</em>
