How hard must she pull downward to raise herself

Reference no: EM1364379

Q. A window washer pulls herself upward using a bucket pulley apparatus. The mass of the person plus bucket is 61 kg. How hard must she pull downward to raise herself slowly at constant speed?

Q. A train has a length of 114 m and starts from rest with a constant acceleration at time t = 0 s. At this instant, a car just reaches the end of the train. The car is moving with a constant velocity. At a time t = 10 s, the car just reaches the front of the train. Ultimately, however, the train pulls ahead of the car, and at time t = 20 s, the car is again at the rear of the train. Find the magnitudes of the following quantities.

(a) the car's velocity

(b) the train's acceleration

Reference no: EM1364379

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