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Question1
An electron is a subatomic particle (m = 9.11 × 10^-31 kg) that is question to electric forces. An electron moving in the +x direction accelerates from an original velocity of +5.40 × 10^5 m/s to a final velocity of +2.10 × 10^6 m/s whereas travelling a distance of 0.038 m. The electron's acceleration is due to two electric forces parallel to the x axis: and, that points in the -x direction. Find out the magnitudes of
(a) Net force acting on the electron and
(b) Electric force.
Question2
An unknown force pushes a 17 kilogram block across a smooth (frictionless) floor. Three seconds after the force is first applied to block, the block is moving with a speed of 6 meters per second. What is magnitude of the unknown force?
a worker drags a 310 kg crate at a constant velocity of 3 m/s, across a factory floor by pulling on a rope tied to the crate. What is the acceleration of the crate
Potassium is an essential element that normally comprises about 0.30% of a person's body mass. What's the potassium activity in a 69kg person
A 0.100g plastic bead is charged by the addition of 1 x10^10 excess electrons (i.e. so the bead becomes negatively charged). What electric field (magnitude and direction) will cause the bead to hang suspended in the air?
While a roofer is working on a roof that slants at 43.0 above the horizontal, If it starts 4.60m from the lower edge of the roof, how fast will the toolbox be moving
A ski starts from rest and slides down a 22° incline 75 m long. If the coefficient of friction is 0.09, what is the ski's speed at the base of the incline? If there is snow level at foot of the incline and it has the same coefficient of friction, ..
You are practicing throwing darts in your dorm. You stand 2.89 m from the wall on which the board hangs. Calculate the speed of the dart when it hits the board
Two parallel wires of length 17 m are separated by a distance of a = 0.13 cm, What is the magnetic force on each wire
How much energy is necessary to bring the system back
A 25.0g sample of copper at 363 K is placed in 100g of water at 293 K. Calculate final temperature of the water
An airplane pilot fell 355 m after jumping from an aircraft without his parachute opening. He landed in a snowbank, creating a crater 1.3 m deep, estimate the work done on him by air resistance as he fell
A 1800 kg car is moving westward with a speed of 26 m/s, and a 2900 kg truck is traveling east with a speed of 14 m/s. Find the velocity of the center of mass of the system
A science student is riding on a flatcar of a train traveling along a straight horizontal track at a constant speed of 12.9 m/s. How high does the ball rise
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