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Q. A 51kg crate, starting from rest, is pulled across a floor with a constant horizontal force of 250N. For the first 10.5m the floor is frictionless, and for the next 10.5m the coefficient of friction is 0.18. What is the final speed of the crate after being pulled these 21?
A horizontal string of length 1.5 meters vibrates with a wave velocity of 1230 m/s at its fundamental frequency.
A hollow aluminium cylinder is to be fitted over a steel piston. At 22°C the inside diameter of the cylinder is 99.2 percent of the outside diameter of the piston. To what common temperature must the two pieces be heated in order that the cylinder ju..
Two spherical objects have a combined mass of 200. The gravitational attraction between them is 8.01×10-6 while their centers are 21.0 apart.
The car accelerates uniformly to a speed of 2.05 m/s in 13.0 s and then continues at constant velocity.
Compute the y-component of acceleration
A 25.0g arrow is shot through a 7.8 cm apple. If the arrow enters the apple at 38.8 m/s and emerges with a speed of 30.10m/s in the same direction, what is the magnitude of force with which the apple has resisted the arrow.
A 78-kg man standing on a scale in an elevator notes that as elevator rises, the scale reads 834 N. What is the acceleration of the elevator.
Vector A has a magnitude of 9.10 units and makes an angle of 54.0° with the positive x-axis. Vector B also has a magnitude of 8.00 units and is directed along the negative x-axis. Using graphical methods find the following.
Two unequal point charges q1 and q2 are held in place unconnected from each other. A point charge Q is placed somewhere between them at a point where it remains stationary when free. From this observation, we can conclude that q1 and q2 must eithe..
A ramp is 25 meters long and is inclined at 30 degrees with the horizontal. A block of mass 25 is pulled up at a constant acceleration of 1 m/s2. The coefficient of kinetic friction is 0.15. If the box starts at rest from the bottom, what would be..
A 155 g copper bowl contains 245 g of water, both at 20°C. A very hot 300 g copper cylinder is dropped into the water, causing the water to boil, with 5 g being converted to steam. The final temperature of the system is 100°C. Neglect energy trans..
assume that the mass moves in a circle at constant speed, and that the string makes an angle theta = 20° with the vertical. How long does it take the mass to create one complete revolution.
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