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A Hollywood daredevil plans to jump the canyon shown in the figure on a motorcycle. There is a 15. m drop and the horizontal distance originally planned was 60 m. however it turns out the canyon is really 69.6 m across.
1. What is his correct launch speed?
2. What is his predicted landing velocity? (Neglect air resistance.)
3. What is the correct angle for his landing ramp (give a positive angle below the horizontal)?
4. If he desires a 2.9-second flight time, what is the correct angle for his launch ramp (deg)?
1.00 ×1020electrons flow through a cross section of a 3.90?mm?diameter iron wire in 4.50s . The electron density of iron is n =8.5×1028m?3
We would like to compare the angular momentum of Mars about its axis of rotation with that of Earth's. The mass of Mars is 11% that of Earth, with a radius 53% that of Earth, and a rotational period 103% that of Earth. Assuming both planets to be uni..
A roller coaster (385 kg) moves from A (5.00 m above the ground) to B (27.0 m above the ground). What is the change in the car's kinetic energy
(a) How tall is the lamp's image if the lamp is a distance of 39.6 cm from the mirror (include sign if negative)? (b) How tall is the lamp's image if the lamp is a distance of 85.8 cm from mirror (include sign if negative)?(c) How tall is the lamp..
Two electrons in the atom are seperated by 1.5x10^-10 m, the typical size of an atom. What is the electric force between them? A positive and negative charge, each of magnitude 2.5x10^-5 C,are seperated by a distance of 15cm. Find the force of each..
Two rockets approach earth from opposite directions at equal speeds relative to the earth. How fast are the rockets moving with respect to the earth
a wire carrying a current is shaped in the form of a circular loop of radius 3.0 mm. if the magnetic field strength at
a neutron star is composed of neutrons and has a density that is approximately the same as that of a nucleus about 2.3
A wheel accelerates with a fix angular acceleration of 4.5 rad/s2. If the initial angular velocity is 1.0 rad/s, find what is the angle the wheel rotates through in 2.0 second
A 100 W lightbulb is plugged into a standard 120 V outlet. How much does it cost per month (30 days) to leave the light turned on continuosly? Assume electrical energy costs 7.5/kWh. (Enter dollars with no unit) What is the resistance of the bulb? Wh..
A pendulum of length 9.00 m is held out to point A. At the vertical position, an overhang effectively cuts the length of the pendulum by an amount equal to 3m. (That is, 3.0 m is no longer free to swing.) How long does this pendulum take for one o..
Imagine a frictionless pulley (a solid cylinder) of unknown mass M and radius r = 0.200 m which is used to draw water from a well. A bucket of mass m = 1.50 kg is attached to a massless cord wrapped around pulley. The bucket starts from rest at th..
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