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Q. A 470 kg cannon fires a 10 kg cannonball with a speed of 200;{rm m}/{rm s} relative to the muzzle. The cannon is on wheels that roll without friction. When the cannon fires, what is the speed of the cannonball relative to the earth?
Q. The loaded cab of an elevator has a mass of 2.8 x 10^3 kg and moves 214 m up the shaft in 23 s at constant speed. At what average rate does the force from the cable do work on the cab?
A cue ball hits a stationary eight ball on a pool table. For which of the following systems is there a change in momentum during the collision? define why.
Compute the momentum of the bullet
A gymnast of mass 56.0 {rm kg} hangs from a vertical rope attached to the ceiling. You can ignore the weight of the rope and assume that the rope does not stretch. Use the value 9.81 {rm m/s^2} for the acceleration of gravity.
If the activation energy for the vacancy formation is given as 0.77 eV for aluminium at (650 degrees Celcius) ^3, what would be the number of vacancies at 650 degrees Celsius? The atomic weight and the density of aluminium is 26.98 g/mol and 2.62 ..
When a train's velocity is 12{rm{ m/s}} eastward, raindrops that are falling vertically with respect to the earth make traces that are inclined 30.0 ^circ to vertical on windows of the train.
A 20 {rm kg} child plays on a swing having support ropes that are 2.3 {rm m} long. A friend pulls her back until the ropes are 39.0^circ from the vertical and releases her from rest.
What is t he steam-side coefficient
A rope applies a horizontal force of 180N to pull a crate a distance of 2m across the floor A frictional force of 60N opposes this motion.
In adding, the snow exerts a retarding force on the sled that points opposite to the direction of motion, and has a magnitude of 57 N. Find out the acceleration of the sled and child.
Two points are located on a rigid wheel that is rotating with an increasing velocity about fixed axis. The axis is perpendicular to the wheel at its center. Point 1 is located on the rim and point 2 is halfway between rim and axis .at any given insta..
Three deer, A, B, and C, are grazing in a field. Deer B is located 64.4 m from deer A at an angle of 53.8 ° north of west. Deer C is located 76.2 ° north of east relative to deer A. The distance between deer B and C is 96.8 m. What is the distance be..
What is the dissimilarity between sprinters and nonathletes
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