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A railroad train travels forward along a straight track at 70 m/s for 630 m and then travels at 59 m/s for the next 629 m. What is the average velocity (in m/s)?
An athlete starts at point A and runs at a constant speed of 6m/s around a round track 100 m in diameter, what is x component of this runner's average velocity between points A and B.
Some European trucks run on energy stored in a rotating flywheel, with an electric motor getting the flywheel up to its top speed of 200π rad/s. One such flywheel is a solid, uniform cylinder with a mass of 450 kg and a radius of 1.5 m.
A small block with mass 0.200 kg is attached to a string passing through a hole in a frictionless, horizontal surface. What is the radius of the circle when the string breaks
Your car tire is rotating at 3.3 rev/s when suddenly you press down hard on the accelerator. What was the tire's angular acceleration
A 67 kilogram soccer player jumps vertically upwards and heads the 0.45 kilogram ball as it is descending vertically with a speed of 25 m/s. find the speed of the ball immediately after the collision
1 a heating element in a stove is designed to dissipate 3200 w of heat when it is connected to 245 v. assuming that the
The biceps brachii produces a force of 100 N while acting at a 115 degree angle to the right horizontally positioned forearm. What is the vertical force component that is acting at the forearm?
An electron is suspended in a vacuum between two oppo- sitely charged horizontal parallel plates. What is the voltage across the plates
q1. a rubber ball of mass m 0.739 kg is dropped from a height ho 4.73 m and it rebounds to a height hf 3.66 m.
A golf ball is hit on level ground at 25m/s and 32 degrees above the horizontal. What is its velocity at the peak of its flight
Research suggests that the electric fields in some thunderstorm clouds can be on the order of 10 kN/C. Compute the magnitude of the electric force acting on a particle with two excess electrons in the presence of a 10.0-kN/C field.
Three resistors, 20, 40, and 72 Ω, areconnected in series, and a 0.53-A current passes through them. What is the equivalent resistance?
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