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A man pushes a 16.0 kilogram shopping cart at a constant velocity for a distance of 24.0 meter. She pushes in a direction 25.0 degree below the horizontal. A 52.0 N frictional force opposes the motion of the cart.
(a) Find the magnitude of the force that the shopper exerts?
N
(b) Find the work done by the pushing force.
J
(c) Evaluate the work done by the frictional force.
(d) Find the work done by the gravitational force.
There is a region with a constant magnetic field 5.2T. The magnetic field is directed out of the page. What is the power in the rod
A piano wire with mass 3.45 g and length 77.0 cm is stretched with a tension of 33.0 N . A wave with frequency 100 Hz and amplitude 1.70 mm travels along the wire. Calculate the average power carried by the wave. What happens to the average power if ..
A parallel plate capacitor has plates 5.0cm by 4.5cm. The plates are seperated by 1.8mm thickness of paper. (dielectric constant=3.7), obtain the energy stored in the capacitor.
Two plane mirrors stand facing each other, 2.79 m apart, and a woman stands between them. What is the position of the third closest image
A street lamp weighs 150N. It is supported by two wires thatform an angle of 120 degrees with each other.The tensions in thewires are equal. find the tension in each wire supporting the street lamp
Now your cousin wants to go on the playground slide, which is 1.5 meters long and has an incline of 30 degrees. what is her final velocity in ms when she reaches the bottom
A 5.7x10^2 kg hot-air balloon takes off from rest at the surface of the earth. The wind and lift forces take the balloon up, doing +9.7 x 10^4 J of work on the balloon in the procedure. At what height above the surface of the earth does the balloo..
Evaluate if the ball clears the crossbar, what is its height with respect to the crossbar when it reaches the plane of the crossbar?
A 770 kg car moving at 21 m/s brakes to a stop. The brakes contain about 15 kg of iron, which absorbs the energy. What is the increase in temperature of the brakes.
The acceleration due to gravity becomes weaker by about three parts in ten million for each meter of increased elevation above the Earth's surface. Suppose a skyscraper is 100 stories tall, with the same floor plan for each story and with uniform ave..
calculate the frictional force needed for a 900 kg car traveling around a 500 m radius curve at 25 ms if the car is to
A 0.400 kg glider is moving to the right on a frictionless, horizontal air track with a speed of 0.900 m/s when it makes a head-on collision with a stationary 0.150 kg glider. Find the final kinetic energy of second glider
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