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A 1,200-N crate rests on the floor. (a) How much work is needed to move it at constant speed 4.8 m along the floor against a friction force of 240 N? (b) How much work is needed to move it at constant speed the same distance vertically?(c) How much work should be done to stop a 1,670-kg car traveling at 149 km/h?
Pulling up on a rope, you lift a 4.35 kilogram bucket of water form a well with an acceleration of 1.78 m/s2. Evaluate what is the tension in the rope
The critical angle for light traveling in a particular optical medium and incident on an interface with air is 46.7o. Calculate the refractive index of this medium
a person throws an object upward with an initial velocity of 20 ms. assuming that the object has an initial height of
A pendulum is made with a 4.00 kg mass suspended at the end of a thin rod, What is the length of the thin rod
While standing on a bridge 15.0 m above the ground, you drop a stone from rest. When the stone has fallen 3.20 m, you throw a second stone straight down. Which initial velocity should you give the second stone if they are both to reach the ground at ..
questionyou might agree with me that policy deployment and project portfolio management ppm go hand-in-hand. at
A car travelling at 37 {rm m/s} runs out of gas while travelling up a 7.0{rm ^ {circ}} slope. How far would it coast before starting to roll back down.
The driver of a 1250 kg car, initially traveling at 10.1 m/s, applies the brakes, bringing the car to rest in a distance of 25.0 m
A 4 kg particle moves at a constant speed of 2.5 m/s around a circle of radius 2 m. find its angular momentum about the center of the circle
A large steam pipe is covered with 1.7-cm-thick insulating material of thermal conductivity 0.21 J/(s m °C). How much energy is lost every second when the steam is at 185 °C and the outside of the pipe has a temperature of 20°C? The pipe has a circum..
a stone is dropped into a river from a bridge 49.2 m above the water. another stone is thrown vertically down 1.49 s
A double slit is opposite the center of a 1.7-m wide screen 2.3 m from the slits. The slit separation is 24 µm and the width of each slit is 7.2 µm. How many fringes are visible on the screen if the slit is illuminated by 590-nm light?
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