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A rope is used to pull a 4.85 kg block at constant speed 5.02 m along a horizontal floor. The force on the block from the rope is 5.48 N and directed 24.1° above the horizontal. What are (a) the work done by the rope's force, (b) the increase in thermal energy of the block-floor system, and (c) the coefficient of kinetic friction between the block and floor
A long jumper (as shown in the figure) leaves the ground at an angle of 17.0° to the horizontal and at a speed of 10.6 m/s. How far does he jump
two loudspeakers placed 6.0 m apart are driven in phase by an audio oscillator, whose frequency range is 1350 Hz to 1826 Hz. What is the frequency produced by the oscillator
A proton has a speed of 0.80c.Calculate the rest energy of the proton. Calculate the total energy of the proton
A ball of mass 4.9 g with a speed of 22.5 m/s strikes a wall at an angle 29.0o and then rebounds with the same speed and angle. compute the average force exerted by the ball on the wall
a parallel-plate capacitor has plates with an area of 1.3times10-2m2 and a separation of 0.83mm. the space between the
two identical capacitors are connected in parallel to an ac generator that has a frequency of 650 hz and produces a
A steel washer is suspended inside an empty shipping crate from a light string attached to the top of the crate. The crate slides down a long ramp that is inclined at an angle of 39 degrees above the horizontal. The crate has mass 244 kg .
A 54 kg ice skater is moving at 39 m/s when she grabs theloose end of a rope, the opposite end of which is tied to apole. What is the ratio of this force to her weight
A uniform disk of radius 0.495 m and unknown mass is constrained to rotate about a perpendicular axis through its center. Find the mass of the disk
question1a piece of aluminium specific heat 0.910 kjkg 0c of mass 138 g at 74 0 c is dropped into a styrofoam cup
A tennis player swings her 1000g racket with a speed of 10m/s . She hits a 60g tennis ball that was approaching her at a speed of 21m/s. what is the average force that the racket exerts on the ball
questiona student standing on a stationary skateboard tosses a textbook with a mass of mb 1.55 kg to friend standing
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