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Category > Physics Posted 08 Jul 2017 My Price 6.00

.A 660 kg car

1.A 660 kg car is moving with an initial speed of 10.0 m/s. A deer jumps into the road and the driver slams on his brakes, honks the car's horn, and says a prayer silently as he swears out loud. The car comes to a screeching halt after 4.00 seconds, just inches from the deer, which then nonchalantly proceeds to cross the road and get hit by a dumptruck coming from the opposite direction. What average power is used to stop the car, in Watts?

 

2.A ball of mass 2.00 kg is tossed to a height of 13.0 m above the ground. If the ball is thrown straight up and air resistance is neglibile, how fast will it be going when it hits the ground, in m/s?

 

3. You pick up a barbell with weights (total mass: 100 kg) from ground to approximately 0.80 m above the ground (roughly equivalent to doing a dealift). Once it has been lifted, you then carry it 10.0 m ata steady speed before stopping and finally gently lowering the barbell back to the ground. How much work have you done on this barbell, in J?

Answers

SuperTutor
(15)
Status NEW Posted 08 Jul 2017 02:07 AM My Price 6.00

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