Physics, 14.02.2020 23:50, alyssakretzmeier
A quarterback is set up to throw the football to a receiver who is running with a constant velocity v⃗ rv→rv_r_vec directly away from the quarterback and is now a distance DDD away from the quarterback. The quarterback figures that the ball must be thrown at an angle θθtheta to the horizontal and he estimates that the receiver must catch the ball a time interval tctct_c after it is thrown to avoid having opposition players prevent the receiver from making the catch. In the following you may assume that the ball is thrown and caught at the same height above the level playing field. Assume that the y coordinate of the ball at the instant it is thrown or caught is y=0y=0 and that the horizontal position of the quarterback is x=0x=0.
Answers: 3
Physics, 22.06.2019 12:10, lks715
Point charges q1 = 51 µc and q2 = −27 µc are placed 1.0 m apart, with q2 on the right. what is the force (in n) on a third charge q3 = 19 µc placed midway between q1 and q2? (assume the positive direction is to the right. indicate the direction with the sign of your answer.)
Answers: 3
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