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An aero plane is flying horizontally at a steady speed of 67 m/s. A parachutist falls from the aero plane and falls freely for 80 meter before the parachute opens. Air resistance is negligible before the parachute opens.
1) Show that the vertical component of the velocity is approximately 40 m/s when the parachutist has fallen80 m. (g=9.8 m/s)
2) Find the magnitude and direction of the resultant velocity of the parachutist at this point?
3) Determine how the magnitudes of the vertical are and horizontal components of the parachutist's velocity are affected by air resistance before the parachute opens?
A startled armadillo leaps upward rising 0.550 m in the first 0.203 is. (a) What is its initial speed as it leaves the ground? m/s (b) What is its speed at the height of 0.550 m? m/s (c) How much higher does it go?
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Two point charges, Q 1 = -2.0 μ C and Q 2 = +2.0 μ C, are placed as shown. In Fig. 21.2b, the x-component of the electric field, at the origin O, is closest to:
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Seat belts and air bags save lives by reducing the forces exerted on the driver, A 58kg person is in a head-on collision. The car's speed at impact is 13m/s. Estimate the net force on the person if he or she is wearing a seat belt and if the air ..
Three uniform spheres are located at the corners of an equilateral triangle. Each side of the triangle has a length of 1.00 m. compute the magnitude of the initial acceleration of the third sphere
A constant force of 20 N is applied to an object of mass 7.5 kg at an angle of 22 degrees above the horizontal, how much power was used to move the object
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