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Q. A 12 kg runaway grocery cart runs into a spring with spring constant 210 N/m and compresses it by 70cm .What was the speed of the cart just before it hit the spring?
Q. Explain how you can lower the pitch of a note on a guitar by altering the thickness or the mass of the string. Why does a sounding board on a musical instrument produce louder sound? Would a plucked guitar string vibrate for a longer or a shorter time if the instrument had no sounding board? Why? Explain how you can lower the pitch of a note on a guitar by altering the length of the string.
What is an acceleration of two falling sky divers (mass 120.0 kg including parachute) while the upward force of air resistance is equal to one-fourth of their weight.
You pull your little sister across a flat snowy field on a sled. Your sister plus the sled have a mass of 31 kg. The rope is at an angle of 30 degrees to the ground. As you pull with a force of 30 N, the sled travels a distance of 45 m.
Decide the speed with the rock is thrown
How does this number of calories compare with the number of calories required to vary the same gram of 100 degree C boiling water to 100 degree C steam.
Two identical carts travel at 1m/s in opposite directions on a common horizontal surface. They collide head-on and are reported to rebound, each with the speed of 2m/s.
What magnitude of charge must be given to the drop
A luge and its rider, with a total mass of 104 kg, emerges from a downhill track onto a horizontal straight track with the initial speed of 53 m/s. suppose they stop with the constant deceleration of 2.30 m/s2.
What is height of the cliff
Estimate the time constant in a RC circuit.
What is acceleration of an object sliding down to plane
A satellite is in a low circular orbit about the Earth (such as it just skims the surface of the Earth). How long does it take to make one revolution around Earth.
How to find out potential energy
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