Physics, 12.01.2021 08:50 kandikisses5594
25 POINTS PLEASE HELP ME ASAP
A cart is moving on a flat surface that has negligible friction. What will happen to its speed?
The cart's speed will increase
The cart's speed will stay constant
The cart's speed will decrease
The cart's speed will initially increase, and then decrease
Which statement about the speed of a chair is correct?
After I push a chair on a frictionless surface, the chair will speed up forever because there is no friction
After I push a chair on a frictionless surface, the chair will move at a constant speed for a while, but eventually slow down because the energy will run out.
After I push a chair on a frictionless surface, the chair will move at a constant speed because there is no longer an energy transfer
After I push a chair on a frictionless surface, the chair will stop because there is no longer a transfer of energy from the hand to make it move
Answers: 3
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Awheel of mass 48 kg is lifted to a height of 0.8 m. how much gravitational potential energy is added to the wheel? acceleration due to gravity is g = 9.8 m/s2. a. 30.4 j b. 3.1 j c. 297.9 j d. 11,321 j
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Physics, 22.06.2019 16:30
An astronaut in space cannot use a scale or balance to weigh objects because there is no gravity. but she does have devices to measure distance and time accurately. she knows her own mass is 77.4 kg , but she is unsure of the mass of a large gas canister in the airless rocket. when this canister is approaching her at 3.50 m/s , she pushes against it, which slows it down to 1.30 m/s (but does not reverse it) and gives her a speed of 2.60 m/s . what is the mass of the canister?
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On your wedding day your lover gives you a gold ring of mass 3.67 g. 48 years later its mass is 3.44 g. on the average how many atoms were abrated from the ring during each second of your marriage? the atomic mass of gold is 197 u. don't enter units
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25 POINTS PLEASE HELP ME ASAP
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