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A horizontal force of magnitude 31.2 N pushes a block of mass4.42 kg across a floor where the coefficient of kinetic friction is0.631.
(a) How much work isdone by that applied force on the block-floor system when the blockslides through a displacement of 4.05 m across the floor?
(b) During thatdisplacement, the thermal energy of the block increases by 33.9 J.What is the increase in thermal energy of the floor?
(c) What is the increase in the kinetic energy of the block?
A baseball is hit with a speed of 28.0{\rm m/s} at an angle of 47.0{\rm ^\circ} . It lands on the flat roof of a 14.0{\rm m} -tall nearby building. what horizontal distance does it travel before it lands on the building
A pesky 1.7 mg mosquito is annoying you as you attempt to study physics in your room, which is 4.5m wide and 2.5 m high. What is the maximum uncertainty in the horizontal position of the mosquito
Halleys comet, which passes around the sun every 76 years, has an elliptical orbit. When closest to the sun (perihelion) it is a distance of 8.823 x 10^10m, calculate its speed at aphelion
The electrical power output of a large nuclear reactor facility is 890 MW. It has a 34.0% efficiency in converting nuclear power to electrical. What is the nuclear power output in megawatts
A string provides a horizontal force which acts on a 500 N rectangular block at top right-hand corner, find the tension in the string required to start to tip the block over
A copper rod 87cm long is used to poke a fire. The hot end of the rod is maintained at 103%u2218C, What is the temperature of the rod 26cm from the cool end
Two hockey players are traveling at velocities of v1 = 11 m/s and v2 = -20 m/s when they undergo a head-on collision. What is the mass of the other player
A hubcap comes off a car that is traveling 100m/s . If it stops rolling after traveling 25 m, How many revolutions did it turn through before stopping
Two long, parallel wires are separated by a distance of 2.8 cm. The force per unit length that each wire exerts on the other is 5 ×10-5 N/m. What is the current in the second wire
A circuit is powered by a 12.0 V battery in series with R1=25 ohms A second set of resistors R2= 75 ohms, What is the voltage drop across the 75 ohm resistor
A 12.0 g rifle bullet is fired with a speed of 740 m/s into a ballistic pendulum with a mass of 8.00 kg, suspended from a light and long cord. Compute the max height through which the block would rise
A playground merry-go-round has a disk-shaped platform that rotates with negligible friction about a vertical axis. how fast will the disk be turning
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