Physics questions and answers in April 2021

Mary applies a force of 74 N to push a box with an acceleration of 0.46 m/s 2 . When she increases the pushing force to 80 N, the box's acceleration changes to 0.74 m/s 2 . There is a cons...
A basketball player is running at 5.40 m/s directly toward the basket when he jumps into the air to dunk the ball. He maintains his horizontal velocity. (a)What vertical velocity (in m/s) does he ne...
Two carts mounted on an air track are moving toward one another. Cart 1 has a speed of 0.9 m/s and a mass of 0.39 kg. Cart 2 has a mass of 0.72 kg. (a) If the total momentum of the system is ...
1) Time is a) dependent on the observer b) absolute e) never changing c) the same for different observers d) simultaneous in all cases 2) The equation E = mc^2 illustrates that a) energy can be conver...
1. In Newtonian mechanics, the speed of light a) is 3 x 108m/s d) will be faster than c b) can be infinite e) none of the above c) will be slower than c 2. Simultaneous events in one frame of referenc...
Please answer the following. Multiple choice 1. In Newtonian mechanics, the speed of light a] is 3 x loamfs d) will be faster than c bl can be infinite e} none ofthe above c} will be slower than c 2....
A car is moving at a rapid pace. It is approaching a garage with doors at either end. The proper length of a the car is longer than the garage. As the car travels through the garage, describe what the...
1. In Newtonian mechanics, the speed of light a) is 3 x 108m/s d) will be faster than c b) can be infinite e) none of the above c) will be slower than c 2. Simultaneous events in one frame of referenc...