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A hot-air balloon consists of a basket, one passenger, and some cargo. Let the total mass be M. Even though there is an upward lift force on the balloon, the balloon is initially accelerating downward at a rate of g/3.
Draw a free-body diagram for the descending balloon.
Find the upward lift force in terms of the initial total weight Mg?
The passenger notices that he is heading straight for a waterfall and decides he needs to go up. What fraction of the total weight must he drop overboard so that the balloon accelerates upward at a rate of g/2 ? Assume that the upward lift force remains the same.
The leg and cast weigh 220 N. find out the weight and the angle needed so that no force is exerted on the hip joint by the leg plus the cast.
A dockworker applies a constant horizontal force of 82.0N to a block of ice on a smooth horizontal floor, What is the mass of the block of ice
If he struck a ball with the a speed and launch angle that would result in a maximum 120m horizontal range on Earth, how far would it go?
The planet Mercury has a mass that is 5.00% of that of Earth, and its gravitational acceleration is gmercury = 3.70 m/s2. a) How long does it take for a rock that is dropped from a height of 2.63 m to hit the ground on Mercury?
A slide projector needs to create a 97 cm high image of a 2.0 cm tall slide, How far should you place the lens from the slide
A rod 14 cm long is uniformly charged and has a total charge of -22 c. resolve the magnitude and direction of the electric field all along the axis of the rod at a point 36.0 cm from its center.
A student (m= 75 kg) falls freely from rest and strikes the ground. throughout the collision with ground, he comes to rest in a time of 0.040 s. the average force exerted on him by the ground is +18 000 N.
A review of the basics of circular motion: The radius of a merry-go-round is 5 meters, and it takes 12 seconds to go around once. What is the direction of the velocity of this atom
A 507g mass oscillates with an amplitude of 13.0 cm on a spring whose spring constant is 23.0 N/m. Determine the total energy
Explain how much work does the gravitational force do on the block as the block travels from point P to (a) point Q and (b) the top of the loop?
A parachutist jumps out of an airplane and acceleratea with gravity to a maximum velocity of 58.8 m/s in 6.o seconds, From what height did the parachutist jump?
Particles pass through a single slit of width 2.3 mm, use the Heisenberg uncertainty principle to determine the minimum range of angles
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