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A particle starts from rest at x = 0 and moves for 15.7 s with an acceleration of +2.25 cm/s2. For the next 40.9 s, the acceleration of the particle is -4.47 cm/s2. What is the position of the particle at the end of this motion?
A stunt man drives a car at a speed of 20m/s off a 30-m-high cliff, How far from the base of the cliff does the car land and What is the car's impact speed
A brave but inadequate rugby player is being pushed backward by an opposing player who is exerting a force of 800 N on him, What is the force of friction between the losing player's feet and the grass
A pressure wave in air is described by the following equation: P(x,t) = A sin(2(pi)t/T - 2(pi)x/lambda), Determine the speed of the pressure wave
An electron beam contains electrons that move along the +x-axis at 0.020c. The beam enters a region of length 1.0 m and runs parallel to a wire that carries a 0.20-A current in the +x-direction.
Illustrate what is the potential energy for the child just as she is released, compared with the potential energy at the bottom of the swing? How much work does the tension in the ropes do as the child swings from the initial position to the bottom?
A student constructs an astronomical telescope with a magnification of 10. what is the resulting length of the telescope
q1. the potential difference between the plates of a capacitor is 70 v. midway between the plates a proton and an
The escape speed of a particular planet with a radius of 7.900e+6 m is 14,500 m/s. What is the mass of the planet
During a testing process, a worker in a factory mounts a bicycle wheel on a stationary stand and applies a tangential resistive force of 120 N to the tire's rim. what force must be applied to the chain
vector r=(7.07(m/s)t)i+(7.07(m/s)t-4.90(m/s^2)t^2)j is the postition of a projectile as a function of time (the x-direction is horizontal, What is the Maximum height of the projectile
An green hoop with mass mh = 2.7 kg and radius Rh = 0.17 m hangs from a string that goes over a blue solid disk pulley with mass md = 2.3 kg and radius Rd = 0.09 m. What is magnitude of the linear acceleration of the hoop
A horizontal force of 213 N is exerted on a 1.90 kg discus as it rotates uniformly in a horizontal circle (at arm's length) of radius 1.60 m. determine the time for one revolution of the discus. Round the answer to 2 decimal places.
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