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How much work is done by gravity when a pine cone (of mass 50g) falls from the top of a tree, 9 m high?
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Initially (at time t = 0) a particle is moving vertically at 5 m/s and horizontally at 0 m/s. Its horizontal acceleration is 1.6 m/s2. At what time will the particle be traveling at 57? with respect to the horizontal? Th ...
Question: A small particle has charge -2.00 uC and mass 1.50Ã-10-4 kg. It moves from point A, where the electric potential is V(A) = 200 V, to point B, where the electric potential V(B) = 920 V is greater than the potent ...
Question: A rocket starts from rest and moves upward from the surface of the earth. For the first 10.0 s of its motion, the vertical acceleration of the rocket is given by ay=(2.60m/s3)t, where the +y-direction is upward ...
Question: A solid sphere and a solid disk of the same mass and radius are rolling wihtout slipping at the same speed. A. What is the ration of their kinetic energies? B. What is the ratio of their angular momenta (measur ...
Question: As Shown in the figure, there are 3 point charges along the x-axis located at 3,8, and 11 cm. What is the x-component of the force on the charge located at x = 8 cm given that q = .85 uC in N? The response must ...
Question: People have proposed driving motors with the earth's magnetic field. This is possible in principle, but the small field means that unrealistically large currents are needed to produce noticeable torques. Suppos ...
Question: A satellite orbiting the moon very near the surface has a period of 110 min. What is the moon's acceleration due to gravity? The response must be typed, single spaced, must be in times new roman font (size 12) ...
Question: A proton with an initial speed of 600,000 m/s is brought to rest by an electric field. What was the potential difference that stopped the proton? What was the initial kinetic energy of the proton, in electron v ...
A slab of clay with a mass of 0.26 kg, moving with a speed of 5.24 m/s, hits a stationary toy car of mass 0.54 kg. If the clay hits and sticks to the car, what is the speed of the clay and car (which are now moving fused ...
Question: A proton and an alpha particle are momentarily at rest at a distance r from each other. They then begin to move apart. Find the speed of the proton by the time the distance between the proton and the alpha part ...
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