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A skycam captured a video from directly overhead of an ice skater performing a spin. When viewed from above she was spinning counter-clockwise. If you watched this video, what direction would her angular velocity vector be pointing? (according the the right hand rule) explain please.
a ball is launched with a velocity of magnitude 6.00 m/s, at an angle of 41.0° to the horizontal. find the angle of its displacement from the launch point
A horizontal spring is lying on a frictionless surface. One end of the spring is attached to a wall whle the other end is connected to a movable object. The spring and object are compressed by 0.085 m, released from rest, and subsequently oscillat..
a 5.0*10^2 N laod is lifted 6.0 m with a pulley. the force exerted on the pulley rope is 165 N and the efficiency is 65 %. how far is the rope pulled
A jet lands at 54.4 m/s, the pilot applying the brakes 2.45 s after landing. Find the acceleration needed to stop the jet within 5.17 x 10^2 m after touchdown.
A proton with the mass m is projected into a uniform electric field that points vertically upward and has magnitude E. The initial velocity of the proton has a magnitude v_0 and is directed at an angle \alpha below the horizontal. A)Find the numerica..
A block with mass m = 4 kg is sitting on the ground and not moving. The acceleration due to gravity is g = 9.81 m/s2. Please answer the following questions.
A 23.0 kg child plays on a swing having support ropes that are 2.10 m long. How fast will she be moving at the bottom of the swing
The so-called "hydrogen alpha (Ha) line" is a specific wavelength of red light caused by excited atomic hydrogen. What is the frequency ( in units of cycles per second, or 1/s) of Ha in vacuum
A ladder of length L = 2.4 m and mass m = 14 kg rests on a floor with coefficient of static friction ?s = 0.56. Assume the wall is frictionless. find the normal force the floor exerts on the ladder
A very distant galaxy has an apparent bolometric magnitude of +23.5. Determine the measured flux of photons
What will be the resulting speed of the boat. A 74 kg fireman slides down a 4-m pole by applying a frictional force of 384 N against the pole with his hands. If he slides from rest, how fast is he moving once he reaches ground.
A 1.0 kg stone is being whirles at constant speed of 12 m/s in a circle, held on a frictionless surface by a steel wire which is horizontal. The wire is 4.0 m long and its radius is 1.0 mm. Find out the strain in the wire.
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