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A spacecraft is on a journey to the moon. At what point, asmeasured from the center of the earth, does the gravitational forceexerted on the spacecraft by the earth balance that exerted by themoon? This point lies on a line between the centers of the earthand the moon. The distance between the earth and the moon is 3.85× 108 m, and the mass of the earth is 81.4 times as great asthat of the moon.
A submarine dives 90.0 m at an angle of 8.0° below the horizontal. What are the horizontal and vertical components of submarine's displacement? (Imagine that upward and the direction of the submarine's horizontal motion is positive.)
A block slides down an inclined plane, starting from rest and being pushed with a constant acceleration of 5.20 m/s2 over a distance of 20.4 cm. Find the total time the block is in motion
A 800kg car pushes a 1800kg truck that has a dead battery. When the driver steps on the accelerator, What is the magnitude of the force of the car on the truck
A uniform horizontal rod of mass (M) and length (l) rotates with angular velocity (omega) about a vertical axis through its center. Determine the angular momentum of the system about the axis
While running home from second base a 67 kg runner rounds third base at a speed of 3.1 m/s, What is the centripetal force of this turn on third base
During a panic stop, a car decelerates at 7.00 m/s^2. What distance does the car travel in this time
A sphere of copper that has a radius of 5 cm is compressed uniformly by a force of 3.0 108 N. Calculate the change in volume of the sphere
Two rocks are thrown off the edge of a cliff that is 15.0 m above the ground. The first rock is thrown upward, at a velocity of +12.0 m/s. The second is thrown downward, at a velocity of 12.0 m/s.
A horizontal slingshot consists of two light, identical springs (with spring constants of 90 N/m) and a light cup that holds a 1-kg stone. Determine the system's total mechanical energy
A person pushes on a stationary 125 N box with 64 N at 30 deg below the horizontal, What is the force friction on the box
A system of 1454 particles, each of which is either an electron or a proton, has a net charge of -7.456×10-17 C. How many protons are in this system
A coil of inductance 110 mH and unknown resistance and a 1.4 ?F capacitor are connected in series with an alternating emf of frequency 980 Hz. what is the resistance of the coil
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