Speed at the tip of trajectory
A projectile is fired straight upward at 141 m/s. How fast is it moving at the instant it reaches the tip of its trajectory? Suppose instead that it were fired upward at 45 degrees. What would be its speed at the tip of its trajectory?
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A particle with a mass of 1.6 × 10-20 kg is oscillating with simple harmonic motion with a period of 3.5 × 10-5 s and a maximum speed of 1.8 × 103 m/s. Calculate (a) the angular frequency and (b) the maximum displacement of the p
A 82.0kg crate is resting on a frictionless surface that is inclined at an angle of 25 degreesabove the horizontal. the crate is held in place by a rope that is parallel to the incline. what is the tension of the rope?
A worker drops a wrench from the top of a tower 61.0 m tall. With what velocity does the wrench strike the ground? (Assume the positive direction is upward.)
How does the magnitude of electrical force between a pair of charged particles change when they are brought to half their original distance of separation?
A rocket of mass 4.5 105 kg is in flight. Its thrust is directed at an angle of 53.0° above the horizontal and has a magnitude of 6.80 106 N. Find the magnitude and direction of the rockets acceleration. Give the direction as an angle above th
A 25 kg chimpanzee hangs from the end of a horizontal, broken branch of length L0 = 1.6 m, as shown in the figure . The branch is a uniform cylinder 4.5 cm in diameter, and the end of the branch supporting the chimp sags downward through a vertica
A horizontal force of 197 N pushes a 14 kg block up a frictionless incline that makes an angle of 65° with the horizontal.
A freezer is comprised of 1.8x1.0x0.5 m^3 volume, insulated with 5 cm thick Styrofoam. (a) At what rate must the compressor remove heat to maintain the inside at - 20 degrees Celsius with the outside at room temperature. (b) What is the R-value of
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