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You are hanging over the edge of a cliff. Your two friends throw down a rope and you hold on to the middle. In terms of your weight, what force would each of them have to exert to pull you up if they could each pull on one end of the rope as they stand side by side? If there is a tree directly above you and they have to stand on either side, what force would each of them have to exert assuming the rope forms a right angle where you are holding it?
A(n) 51.6 cm length of wire when used as a resistor has a resistance of 0.00668 ?. The ends of the wire are connected to form a circular loop, At what rate is thermal energy generated in the wire
The power supplied to a typical black-and-white television set is88 W when the set is connected to 120V. How much electrical energy does this setconsume in 1 hour?
A 200 turn 10^-3 cross sectional area coil is immersed in a magnetic field such that the plane of the coil is perpendicular to the field. how much voltage is induced
An aluminum cup contains 225 g of water and a 40-g copper stirrer, all at 27°C. Calculate the mass of the aluminum cup
A circular curve of highway is designed for traffic moving at60km/h/. what is the correctangle of banking of the road
A girl is using a rope to pull a box that has mass of 35kg across a level surface with constant velocity. What is the normal force of the floor on the box
A rock climber throws a small first aid kit to another climber who is higher up the mountain. What is the vertical height between the two climbers
A football is kicked straight up into the air; it hits the ground 3.4 later. With what speed did it leave the kicker's foot
The fire department decides to use the burning books to heat water
an airplane on a carrier is designed so that the speed of the air below the wing is the air speed, v, of the plane, and the speed above the wing is 30% bigger. What is the total wing area of the plane
A 48.9 kg pole vaulter running at 13.0 m/s vaults over the bar. Assuming that the vaulter's horizontal component of velocity over the bar is 1.7 m/s and disregarding air resistance, how high was jump.
A 6 kg box is being pulled by a force F = 95 N at an angle of 54° from the horizontal. calculate the Work done by the external force
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