A bumper car is moving at constant velocity when another bumper car starts to push on it with a constant force at an angle of 60 degrees with respect to the first car's initial velocity. The second bumper car continues pushing in exactly that direction for some time. What is most likely to happen is that
a. the first car will stop moving.
b. the first car will move in the direction of the force.
c. the first car's velocity will increase in magnitude but not change direction.
d. the first car's velocity will gradually change direction more and more toward that of the force while increasing in magnitude.
e. the first car's velocity will gradually change direction more and more toward that of the force while decreasing in magnitude.
d
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Polonium-215 alpha decays with a half life of 1.8 ms
(a) How much is left after 1. second? (b) What is the daughter nucleus?
A wire is 12.00 m long and has a diameter of 1.50 mm. The tensile modulus of the wire is
If a force of 500 N is applied to end of the wire, then the increase in length of the wire is
A. 38.5 mm. B. 40.2 mm. C. 44.1 mm. D. 48.5 mm. E. 51.50 mm.
The ecliptic
A) occurs during a solar or lunar eclipse. B) is the average distance between the Sun and Earth. C) is the plane of Earth's orbit. D) refers to the gases from which our solar system formed.
A straight wire carries a current of 40 A in a uniform magnetic field (magnitude = 80 mT). If the force per unit length on this wire is 2.0 N/m, determine the angle between the wire and the magnetic field.
A. either 39° or 141° B. either 25° or 155° C. either 70° or 110° D. either 42° or 138° E. either 65° or 115°