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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 . The ball rebounds at 40m/s .
1) How fast is her racket moving immediately after the impact? You can ignore the interaction of the racket with her hand for the brief duration of the collision.?
2) The tennis ball and racket are in contact for 12ms , what is the average force that the racket exerts on the ball?
A wagon is rolling forward on level ground. Friction is negligible. The person sitting in the wagon is holding a rock. Find the speed of the wagon after the rock is thrown
Chromium is produced by reacting with its oxide with aluminium. If 304 g of Cr2O3 and 108 g of Al completely react to form 204 g of Al2O3 how many grams of Cr are formed.
assuming each galaxy contains the mass of 200 billion suns and there are 200 billion such galaxies, what is the schwarzschild radius of the universe
q1. a lighthouse that rises 49 above the surface of water sits on a rocky cliff that extends 19 from its base. a sailor
a cylindrical can 8.00cm outside diameter and 20cm high floats upright in the water. how high will the water rise
A wave pulse travels down a slinky. The mass of the slinky is m = 0.93 kg and is initially stretched to a length L = 6.8 m. What is the wavelength of the wave pulse
A cube of ice is taken from the freezer at -8.7°C and placed in a 97 g aluminium calorimeter filled with 351 g of water at the room temperature of 20°C. The final situation is observed to be all water at 19°C. What was the mass of an ice cube.
An alpha particle (a helium nucleus) is traveling along the positive x-axis at 1350 m/s, How far does the particle travel before hitting the tube wall
A hoop and a disk, both of 0.36- m radius and 4.0- kg mass, are released from the top of an inclined plane 3.1 m high and 8.9 m long. What is the speed of the disk
A closed 2.0 liter container holds 3.0 mol of an monatomic gas. Pressure atm. Find the volume of the open container and Final temperature
question1a car travelling at 110 rm kmh strikes a tree. the front end of the car compresses and the driver comes to
A block of mass 2.7 kg being released from rest on a 1m frictionless plane, inclined at an angle of 40 degree. The block sided down the inclined and struck second block mass of 3.7 kg. If the two blocks stick together, with what speed would they move..
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