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starting from rest, a 4.0-kg crate of cell phones reaches a horizontal speed of 8.0 m/s in 2.0 s. What is the net force acting on the crate?
During a circus performance, a 70.3-kg human cannonball is shot out of an 15.4-m-long cannon. determine the average net force exerted on him in the barrel of the cannon
q1. an electric force of 4.0 n exists between two objects separated from each other by a distance of r. if the distance
If it started falling from an upright position, what was the initial angular acceleration of the structure? suppose that the bottom did not slide across the floor and that it did not fall out of plane; that is, during the fall, the structure remained..
A deuteron is accelerated from rest through a 10-kV potential difference and then moves perpendicularly to a uniform magnetic field with B = 1.6 T. What is the radius of the resulting circular path
A stone is dropped from the roof of a building; 1.90s after that, a second stone is thrown straight down with an initial speed of 25.0m/s , How long did it take the first stone to reach the ground
A 2590-kg spacecraft is in a circular orbit 2720 km above the surface of Mars. How much work must the spacecraft engines perform to move the spacecraft to a circular orbit that is 4480 km above the surface
A classroom demonstration is done with an Atwood machine. The masses are m1 = 1.0 kg and m2 = 1.10 kg. what is the acceleration of gravity at that place
calculate the final temperature of the puddle once it settled to equilibrium. (Assume the chamber walls are sufficiently flexible to allow the system to remain isobaric and consider thermal losses/gains from the chamber walls as negligible.)
A landing craft approaches the surface of Penitgy, a planet in a far-away galaxy. The landing craft has two engines attached to the bottom, what is the mass of the landing craft
A swimmer looks upward from the bottom of a 3.0-m-deep swimming pool. How far from the swimmer does the board appear to be
A photon of red light (wavelength = 710 nm) and a Ping-Pong ball (mass = 2.20 x 10-3 kg) have the same momentum. At what speed is the ball moving
while Jo moves off in the opposite direction at a speed of 0.946m/s. assuming that friction is negligible, find out Al's mass.
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