3) You are trying to hold a box of mass 10 kg against a rough wall by pressing i

Question

3) You are trying to hold a box of mass 10 kg against a rough wall by pressing it horizontally with a force 120N. WIll you hold the box this way, if the coefficient of friction is 0.5? If not, find the acceleration of sliding.

4) An object is hanging by a string from your rearview mirror. While you are accelerating at a constant rate from rest to 50 mph in 10 seconds, what angle does the string make with the vertical?

(Please show the steps to the solutions, and draw an diagram if you can.) 1) A 'bob' on a 0.6 m long string is rotated in vertical circle with the minimum possible speed. Find tangential and centripetal acceleration of the 'bob' in the position when the string makes 30 degree angle above horizontal. 2) A spring shoots a 2 kg block over a frictionless incline up 3 m. How much the spring was compressed before the shooting when its coefficient is 200 N/m and the incline makes an angle of 30 degree with horizontal. 3) You are trying to hold a box of mass 10 kg against a rough wall by pressing it horizontally with a force 120N. WIll you hold the box this way, if the coefficient of friction is 0.5? If not, find the acceleration of sliding. 4) An object is hanging by a string from your rearview mirror. While you are accelerating at a constant rate from rest to 50 mph in 10 seconds, what angle does the string make with the vertical?

Explanation / Answer

sorry i am unable to uplaod the final solution, so i am psoting the link of that solution

for 1) & 2) the link is

http://postimg.org/image/6ihm6jol3/

for 3) & 4) the link is

http://postimg.org/image/vyg3v5wrh/

thank you , i will be happy to clarify your doubt further if any....

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