physics
A 52-kg pole vaulter running at 12 m/s vaults over the bar. Her speed when she is above the bar is 0.7 m/s. Neglect air resistance, as well as any energy absorbed by the pole, and determine her altitude as she crosses the bar.
physics
Tarzan swings on a 34.0-m-long vine initially inclined at an angle of 33.0° with the vertical. (a) What is his speed at the bottom of the swing if he starts from rest? m/s (b) What is his speed at the bottom of the swing if he pushes off with a speed of 5.00 m/s? m/s
physics
A 7.80-g bullet moving at 520 m/s penetrates a tree trunk to a depth of 4.60 cm. (a) Use work and energy considerations to find the average frictional force that stops the bullet. N (b) Assuming the frictional force is constant, determine how much time elapses between the mome...
physics
A block of mass 2.50 kg is pushed 2.80 m along a frictionless horizontal table by a constant 12.0 N force directed 25.0° below the horizontal. (a) Determine the work done by the applied force. J (b) Determine the work done by the normal force exerted by the table. J (c) De...
college algebra
(x+2)(x^2-2x+4)(x-2)(x^2+2x+4)
math
The volume of a cone is 190 in3. Find a function that models the height h of the cone in terms of its radius r.
math
A right triangle has one leg four times as long as the other. Find a function that models its perimeter P in terms of the length x of the shorter leg.
math
The sum of two positive numbers is 90. Find a function that models their product P in terms of x, one of the numbers.
math
A rectangle has an area of 15 m2. Find a function that models its perimeter P in terms of the length x of one of its sides.
math
The height of a cylinder is three times its radius. Find a function that models the volume V of the cylinder in terms of its radius r.
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