A weight lifter is trying to lift a 1500-N weight but can apply a force of only 1200 N on the weight. One of his friends helps h
1 answer:
Answer:
300 N
Explanation:
We have three forces acting on the object:
- W = 1500 N, downward: the weight of the object
- F1 = 1200 N, upward: the force exerted by the first man
- F2, upward: the force exerted by the friend
In order to lift the object, the sum of the two forces F1 and F2 must be at least equal to the weight of the object W. Therefore we can write
And from this equation, we can find the magnitude of F2:
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Answer:
ax = 6.43m/s²
Explanation:
The acceleration is the time derivative of the velocity function ax = dvx(t)/dt
We have been given the velocity function v(t) and also the velocity v = 12.0m/s and we are requested to calculate the acceleration at this time which we don't know.
So the first step is to calculate the time at which the velocity =12.0m/s and with this time calculate the acceleration. Detailed solution can be found in the attachment below.
