Two objects, with masses and , attract each other with force . If the mass of increased by a factor of two then the new gravitational force would be:
F/4
2 F
4 F
F/2
Two point charges nC and nC are 0.100 m apart. Point A is midway between them and point B is 0.080 m from and 0.060 m from . Take the electric potential to be zero at infinity.
(a) Find the potential at point A.
(b) Find the potential at point B.
(c) Find the work done by the electric field on a charge of 2.50 nC that travels from point B to point A.
It takes the elevator in a skyscraper 4.0 s to reach its cruising speed of 10 m/s. A 60 kg passenger gets aboard on the ground floor. What is the passengers
A 7.0- g bullet is fired into a 1.5- kg ballistic pendulum.The bullet emerges from the block with a speed of 200 m/s, and theblock rises to a maximum height of 12 cm. Find the initial speed ofthe bullet.
A fan blade rotates with angular velocity given by , where and . (a) Calculate the angular acceleration as a function of time. (b) Calculate the instantaneous angular acceleration at at t = 3.00 s and the average angular acceleration for the time interval t = 0 to t = 3.00 s. How do these two quantities compare? If they are different, why?