Mechanics | Relativity Answers

A ball is thrown horizontally with a velocity of 12m/s. How long will it take for the ball to hit the ground if it is released 3.5m from the ground.

Assume no air resistance

The type of wall in which no heat can be transmitted is called ______??

1.express 0.55tones into grams and give your answer in standard form
2.write 32067into significant figures

To unload a truck a down ramp of length 8.0 m is arranged so it is downwards at an angle of
30.0° to the horizontal. Boxes of fruit and placed on the ramp and they slide down attaining a
velocity of 4.00 m/s by the time it reaches the bottom of the ramp. Determine the energy loss
due to friction while sliding down the ramp by considering the changes in the potential energy
and the kinetic energy of the box, between the top and bottom of the ramp. Hence determine a
value for the kinetic coefficient of friction

The brown hawk flies at an altitude of 25 meters at a speed of 6 m / s. The weight of the hawk is 600 g.

What is the a) kinetic energy of the hawk b) the potential energy and c) the mechanical energy when the zero level of the potential energy is at ground level?

[img]https://upload.cc/i1/2020/04/06/gJcTdA.jpg[/img]



d8 is 4

[img]https://upload.cc/i1/2020/04/06/huqGD6.jpg[/img]


d8 is 4

[img]https://upload.cc/i1/2020/04/06/huqGD6.jpg[/img]



question is in picture, d8=4

[img]https://upload.cc/i1/2020/04/06/zhY4Dw.jpg[/img]



question is in picture, d8=4

[img]https://upload.cc/i1/2020/04/06/gJcTdA.jpg[/img]



question is in the picture, also d8=4