The second choice is the answer
Momentum is the product of mass and velocity.
Thus, P=mv
where,
P is momentum.m is mass of the body.v is velocity of the body.
B. picking up a box off the floor
From the geometry of the problem, the 20 m-long cable creates
the hypotenuse of a right triangle, with the extended of the other two sides of
size 20 m * cos(30 deg), which is around 17.3 m. Therefore, the ball has increased
by 20 m - 17.3 m = 2.7 m.
The potential energy will have altered by m*g*h, which is 1400 kg * 9.8 m/s^2 *
1.6 m , or about 37044 joules.
Explanation:
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