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Does a centripetal force that acts on an object rotating in a circular path do work on an object? What is your explanation, and what evidence can you cite to support your answer?
A projectile is shot directly away from Earth's surface. Ignore the rotation of the Earth. Find what least initial mechanical energy required at launch if the projectile is to escape Earth
You are driving in your car along a country road at a speed of 27.0m/s. As you come over a crest of a hill, how far is the tractor in front of you when you finally stop
A block of weight w = 25.0N sits on a frictionless inclined plane, which makes an angle theta = 29.0^\circ with respect to the horizontal, as shown in the figure. (Figure 1) A force of magnitude F = 12.1N , applied parallel to the incline, is just..
A space traveler weighs 565 N on earth. What will the traveler weigh on another planet whose radius is 3 times that of earth and whose mass is twice that of earth.
A scientist is running at speed, u, toward a large, smooth wall while holding a tuning fork that vibrates at frequency, f. what is the beat frequency she hears
An .8m string has a .3kg mass on the end. If the string breaks at 5000N, what's the max velocity at the top and bottom of a vertical circle
The radius of the neutron is 1.2 × 10-15m and so this seems a reasonable estimate for the radius of the orbits. If the up quark moves around in one direction, and the down quarks move in the opposite direction, all with the same speed v how fast w..
A horizontal rifle is fired at a bull's-eye. The muzzle speed of the bullet is 671 m/s. compute the horizontal distance between the end of the rifle
A bowling ball encounters a 0.760m vertical rise on the way back to the ball rack, as the drawing illustrates. find the gain in potential energy at the top
An object falls a distance h from rest. If it travels 0.5h inthe last 1.00s find the time and the height of its fall
An infinite plane of charge (see figure below) has a charge perunit area of σ = 2.7 µC/m2. What is the change in the electric potential between points that are2.3 m (initial) and 4.6 m (final) from the plane?
A police officer in hot pursuit drives her car during a circular turn of radius 300m with a constant speed of 80.0km/h. Her mass is 55.0kg. What are the magnitude and the angle (relative to vertical) of the net force of the officer on the car seat? (..
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