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A 384 kg piano slides 3.6 m down a(n) 27° incline and is kept from accelerating by a man who is pushing back on it parallel to the incline (see figure). The effective coefficient of kinetic friction is 0.40. (a) Calculate the force exerted by the man. (b) Calculate the work done by the man on the piano. (c) Calculate the work done by the friction force. (d) Calculate the work done by the force of gravity.
an electric field of intensity 3.10 knc is applied along the x-axis. calculate the electric flux through a rectangular
A 5.0 µF capacitoris connected in series with a 10.0 µF capacitor. This combination isthen connected in parallel with a 6.67 µF capacitor. The three capacitornetwork is then connected in series with a 10.0 µF capacitorand a 5.0 µFcapacitor. The en..
A pendulum of length 50cm is pulled 30 cm away from vertical axis and free from rest. What would be its speed at the bottom of its swing.
A child playing in a swimming pool realizes that it is easy to push a small inflated ball under the surface of the water while a large ball requires alot of force. calculate the diameter of the ball
A rock is shot up vertically upward from the edge of the top of the building. The rock reaches its maximum height 2 s after being shot. find how tall is the building
A uniform rod of length 0.880 m and mass 11.5 kg is balanced on a sharp edge at 0.580 m from the left end. Calculate the torque on the center of mass of the rod alone with respect to the pivot point
A 150 g aluminum cup contains 150 g of water and both are at 13 C. If you add 150 g of hot water at 90 C what is the final temperature at thermal equilibrium? How much hot water at 90 C needs to be added to achieve a final temperature of 44 C?
q1. a man lifts a 22.4 kg bucket from a well and does 6.7 kj of work. the acceleration of gravity is 9.8 ms2.how deep
Two lightbulbs operate on the same potential difference. Bulb A has four times the power output of bulb B. What is the ratio of the current in bulb A to the current in bulb B?
An AC generator has 100 rectangular loops on its armature. Each loop is 11 cm long and 6 cm wide. The armature rotates at 1400 rpm about an axis parallel to the long side. If the loop rotates in a uniform magnetic field of 0.7 T, which is perpendicul..
Three point charges are placed at the corners of an isosceles triangle. At the left and right end points of the base are 6 micro coulomb and 6 micro coulombrespectively, What is the magnitude of the electric field at the midpoint of the baseline
A sound source approximated as a point radiates sound equally in all directions. What is the total power of the source
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