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A 240-kg crate is pushed horizontally with a force of 685 N. If the coefficient of friction is 0.20, calculate the acceleration of the crate.
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A ball rolls off a table with a horizontal velocity of 5 m/s if takes 0.6 seconds for it to reach the floor a) what's the vertical component of the ball's velocity just before it hits the floor b) what's the horizontal c ...
Question: Suppose that the coefficient of kinetic friction between Zak's feet and the floor, while wearing socks, is 0.250. Knowing this, Zak decides to get a running start and then slide across the floor. If Zak's speed ...
Question: A proton has been accelerated from rest through a potential difference of -1350 V. What is the proton's kinetic energy, in electron volts? What is the proton's kinetic energy, in joules? What is the proton's sp ...
Question: A spherical balloon has a radius of 6.95m and is filled with helium. The density of helium is 0.179 kg/m3, and the density of air is 1.29 kg/m3. The skin and structure of the balloon has a mass of 960kg . Negle ...
Question: Suppose you wanted to charge an initially uncharged 124 pF capacitor through a 65 Mohm resistor to 90% of its final voltage. How much time (in s) would be required to do this? The response must be typed, single ...
A hiker measures the angle of elevation to the top of a cliff as 16.0o. She walks 1.20 km further away from the cliff on level ground, she finds the angle to be 11.0 o. a) Draw a diagram of the problem - you may ignore t ...
Suppose the convention were adopted that defines W and W 0 in the first law of thermodynamics to be the "work done on the system by the surroundings." a. Write the first law with this alternate convention. b. Why do the ...
Question: A rock thrown with speed 10.5 and launch angle 30.0(above the horizontal) travels a horizontal distance of = 18.0before hitting the ground. From what height was the rock thrown? Use the value = 9.810 for the fr ...
John is traveling north at 20 meters/second and his friend Betty is traveling south at 20 meters/second. If north is the positive direction, what are John and Betty's speeds?
Question: For this problem, take the distance from the Earth to the Sun to be 1.5 x 10 11 m and the radius of the Earth to be 6.38 x 06m. A) Using the fact that the earth orbits the Sun once per year, calculate the Earth ...
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