Answer:
123.61 J
Explanation:
PE = KE
mgh = 1/2 mv2.
(2.80)(9.81)(4.50)=123.606J
Answer: Option (c) is the correct answer.
Explanation:
According to the second law of motion mass of an object times its acceleration is equal to the net force on the object.
Mathematically, F = ma
Generally, mass is expressed in kilograms (kg) and acceleration is expressed as follows.
acceleration =
=
=
Hence, S.I unit of acceleration is .
Therefore, units of force will be as follows.
F = ma
=
Thus, we can conclude that gives the correct units for force.
Answer:
D
Explanation:
appearance is not a imp factor . location could be imp. becoz a proper environment is need to study such courses.
<span>inclined plane formula is length/hight
so 5/2= 2.5
and work= f x d so
work= 5 x 104 x 10= 5200 W
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