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A child's sled has rails that slide with little friction across the snow. Logan has an old wooden sled with heavy iron rails that has a mass of 11 m/s quite a bit for a 27 kg child! Logan runs at 4.0 m/s and leaps onto the stationary sled and holds on tight as it slides forward. The impact time with the sled is 0.28s.A) Immediately after Logan jumps on the sled, how fast is it moving?B) What was the force on the sled during the impact?C) How much energy was "lost" in the impact?
Find the net force on the Moon (mM = 7.35 × 1022 kg) due to the gravitational attraction of both the Earth mE = 5.98 × 1024, Determine the direction of the net force
A 1000-kg cart is rolling to the right at 5m/s. A 75-kg man is standing on the right end of the cart. What is the speed of the cart if the man suddenly starts running to the left with a speed of 10.00m/s relative to the cart.
It takes a student t = 7.6 s to push a block m = 11 kg at a constant velocity over a distance of d = 8.2 m. Write an expression for the energy required to move the block along this path in terms of the variables provided
A child on a sled starts from rest at the top of a 15.0 degree slope. If the trip to the bottom takes 15.2s, how long is the slope
Both surfaces of a double convex lens have radii of 30.8 cm. what is the index of refraction of the lens material
In an explosion, an object breaks down into two pieces, M1 and M2. M2 flies away at 3 times the speed of M1. Which mass has more momentum immediately after the explosion
A wire of resistance 9.0 is connected to a battery whose emf script e is 5.0 V and whose internal resistance is 1.0. How much energy appears in the wire as thermal energy in that time
Find the electric field at the top point of a right circular solid cone of charge Q, uniform density. The cone has a radius a and a height h.
A car drives north at 46 for 10 and then turns east and goes 5 at 60. At last, it goes southwest at 30 for 6.0. What is the average velocity.
The car and minivan collide and stick together. Suppose the direction of the wreckage after the impact is 42.0° above the x axis.
Turner's treadmill starts with a velocity of ?3.5 m/s and speeds up at regular intervals during a half-hour workout. What is the average acceleration of the treadmill during this period
Find the maximum altitude reached by the rocket.
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