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Two crates, of mass 77 kg and 108 kg, arein contact and at rest on a horizontal surface (Fig. 4-47). A 729 Nforce is exerted on the 77 kg crate.If the coefficient of kineticfriction is 0.15, calculate the following: the force that eachcrate exerts on the other, Acceleration is 2.5
In a head-on collision, the car stops in 0.23 {rm s} from a speed of 17 {rm m}/{rm s}. The driver has a mass of 77 {rm kg}, and is, fortunately, tightly strapped into his seat. What force is applied to the driver by his seat belt during that fract..
The 40 kg man in the roller coaster car is sitting on a bathroom scale. If he is travelling at 35.3 m/s at the point shown and the radius of vertical coaster track is 53 meters, to the nearest newton what does the scale read?
A 1000 kg experimental rocket sled on a level frictionless rail is loaded wiht 50kg of propellant. It exhausts the propellant in a 20-s "burn". If rocket, initially at rest, moves at 150m/s after the burn, what impulse is experienced by the rocket..
A ball is released from rest on a no-slip surface, as shown. After reaching its lowest point, the ball begins to rise again, How high does the ball rise on the frictionless side
Two lightweight rods d = 30 cm are mounted perpendicular to an axle and at 180° to each other. What is the component of the total angular momentum along the axle
If 62.9 L of oxygen at 18.0°C and an absolute pressure of 2.28 atm are compressed to 56.5 L and at the same time the temperature is raised to 50.0°C, What is the average translational kinetic energy of a nitrogen molecule at STP
The drawing shows three particles far away from any other objects and located on a straight line. Find the net gravitational force
In a serious accident, a nuclear power plant%u2019s reactor vessel cracks, and all of the cooling water drains out. How long will the melting take
An object at rest on a flat, horizontal surface explodes into two fragments, one seven times as massive as the other. How far does the lighter fragment slide
If astronauts could travel at v = 0.910c, we on Earth would say it takes (4.20 / 0.910) = 4.62 years to reach Alpha Centauri, 4.20 light-years away. How much time passes on the astronauts' clocks
If 0.2 kg of chai tea at 90 degrees C is poured into a 0.3 kg cglass cup(C=840 J/kg K) at 20 degrees C, what is the final temperature of the chai tea
The Concorde is 62 m long when its temperature is 23°C. In flight, the outer skin of this supersonic aircraft can reach 106°C due to air friction. Find the amount by which the Concorde expands
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