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Why is skiing into a wall of deep powder less hazardous to your health than skiing into a wall of bricks? Assume in both cases that you have the same initial speed and come to a complete stop.
The increased stopping time in powder means a smaller stopping force
The decreased stopping time In powder means larger stopping force
The change in momentum is less in powder
The impulse is less in powder
A tennis ball is shot vertically upward in an evacuated chamber with an initial speed of 20.0 m/s at time t=0. How high does the ball rise
Two kids are playing a game in which they try to hit a box on the floor with a marble fired from a spring loaded gun that is mounted on a table. Find how far should Rhoda compress the spring to score a direct hit
What is the movement of the centre of mass of the two particles
A 95 g ice cube at 0°C is heated until 85 g has become water at 100°C, How much energy was added to accomplish the transformation
A ball of mass 5.0 kg is lifted off the floor a distance of 1.7 m. What is the velocity of ball just before it hits the floor
A 15 kg block is accelerated at 2.0 m/s2 up a frictionless plane inclined at 5.0° to the horizontal, with the speed increasing from 10 m/s to 24 m/s. What is the change in the block's mechanical energy
An object's true weight is 123 N. When it is completely submerged in water, its apparent weight is 82 N. what is the density of the object
Suppose that 3.00 g of hydrogen is separated into electrons and protons. What is the resulting compressional force on the Earth
A particle moves along the x axis. It is initially at the position 0.320 m, moving with velocity 0.140 m/s and acceleration -0.200 m/s2. Find the position of the particle after this time
A bungee cord is stretched between two poles with a force of 393 N. What is the velocity of a wave on this bungee cord
A straight 2.30 wire carries a typical household current of 1.50 (in one direction) at a location where the earth's magnetic field is 0.550 gause from south to north. Find the magnitude of the force that our planet's magnetic field exerts on this c..
.A cosmic-ray proton in interstellar space has an energy of 10.0 MeV and executes a circular orbit having a radius equal to that of Mercury’s orbit around the Sun (5.80 m). Illustrate what is the magnetic field in that region of space?
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