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Q. A person is trying to move a dresser by pushing it with a horizontal force applied at a height above floor. The dresser has mass, length and height. The coefficient of kinetic friction between dresser and the floor is and is the acceleration because of gravity. The floor exerts upward normal forces with magnitudes and where the dresser's legs rest on the floor. Note that this is a 2-dimensional problem.
Q. Given an angular speed omega, find out the radius R (omega) at which the mass rotates without moving toward or away from the origin.
Find out the minimum acceleration of the antelope.
How far apart are an object and an image formed by a 75-cm focal-length converging lens if the image is 2.64 X larger than object and is real.
A tuning fork with a frequency of 356 Hz is found to cause resonance in a closed column of air at 41 cm and at 65 cm. Find the velocity of sound produced by the tuning fork.
A hot wheels track has a spring loaded launcher. A 100g car is pushed into the launcher, which compresses the spring by 2cm. The cars initial velocity after launching is 3m/s.
Two charged bodies exert a force of 0.790N on each other. If they are moved so that they are one-fourth as far apart, what force is exerted.
guess the force between a proton and an electron at the Bohr radius of 0.5Å (1 Å=10-10 m). The magnitude of the charge of an electron, as well as a proton, is 1.6·10-19 C.
Suppose a heat engine takes in 420 J of energy from a hot reservoir and performs 30 J of work in each cycle.
A 425 kg bear grasping a vertical tree slides down at constant velocity. What is friction force that acts on the bear.
Travelling at the speed of 14.10 m/s, driver of an automobile suddenly locks the wheels by slamming on the brakes. The coefficient of kinetic friction between the tires and the road is 0.650. What is the speed of automobile after 1.130 s have elapsed..
How high a tree would a 79.0 kg person have to climb to increase his gravitational potential energy relative to the ground by that amount.
A 3 m long rigid beam with a mass of 115 kg is supported at each end. An 60 kg student stands 2 m from support 1. How much upward force does each support exert on the beam.
A 90° inverted cone contains water as shown. The volume of the water in the cone is given by V = (p/3) h3. The original depth of the water is 10 cm. A block with a volume of 200 cm3 and a specific gravity of 0.6 is floated in the water. Find the c..
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