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Q. Two crates, of mass 75 kg and 105 kg, are in contact and at rest on a horizontal surface. A 732 N force is exerted on the 75.00 kg crate.
If the coefficient of kinetic friction is 0.15, calculate the following:
(i) acceleration of the system(ii) force that each crate exerts on the other
Two point charges and are held in place 4.50 apart. Another point charge -2.5 of mass 6 is initially located 3.00 from each of these charges and released from rest. You observe that the initial acceleration of -2.50 is 354 upward, parallel to the ..
A man sitting in a bosun's chair that dangles from a massless rope, which runs over a massless, frictionless pulley and back down to the man's hand. The combined mass of the man and chair is 86 kg. With what force magnitude should the man pull on ..
A 75 , 33 long rod hangs vertically on a frictionless, horizontal axle passing by its center. A 12 ball of clay traveling horizontally at 2.6 hits and sticks to the very bottom tip of the rod.
The wind blows with a force of 425N north on a sail boat, while the water exerts a force of 325N west on the sailboat. Find out the magnitude and direction of the net external force on the sailboat.
The frequency of an opera singer is 450 Hz. Assume the speed of sound in air is 340 m/s. What is the frequency heard by an observer who is running down the road towards the opera singer with a speed 25.0 m/s.
A football spends a total of 5 seconds in the air. It reaches a peak height of 30 meters. How long does it take to reach its peak height? The football has the range of 90 yards. What is its horizontal velocity.
The molecule has a rotational kinetic energy that is of the translational kinetic energy of its center of mass. What then is molecule's angular speed about the center of mass.
An archer shoots an arrow horizontally at the target 14 m away. The arrow is aimed directly at the center of target, but it hits 59 cm lower.
The power needed to operate your body is about 100 {rm watts}. Suppose your body could run on fusion power and could convert a total of 0.7 of its mass into energy. How much energy would be available through fusion? Assume the mass is 70kg.
A 700 N window washer is standing on a uniform scaffold supported by a vertical rope at each end. The scaffold weighs 200 N and is 3 m long. what is the force in each rope when washer stands 1 m from one end.
A large cylindrical water tank is mounted on a platform with its central axis vertical. The water level is 3.75 m above the base of the tank, and base is 6.50 m above the ground. A small hole 2.23 mm in diameter has formed in the base of the tank. Bo..
The radius of Venus's orbit is 0.72 times that of Earth's orbit. How much stronger is the Sun's gravitational field at Venus than at the earth.
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