Posted by **Anonymous** on Sunday, December 8, 2013 at 2:24pm.

A ruler stands vertically against a wall. It is given a tiny impulse at θ=0∘ such that it starts falling down under the influence of gravity. You can consider that the initial angular velocity is very small so that ω(θ=0∘)=0. The ruler has mass m= 200 g and length l= 20 cm. Use g=10 m/s2 for the gravitational acceleration, and the ruler has a uniform mass distribution. Note that there is no friction whatsoever in this problem. (See figure)

(a) What is the angular speed of the ruler ω when it is at an angle θ=30∘? (in radians/sec)

ω=

(b) What is the force exerted by the wall on the ruler when it is at an angle θ=30∘? Express your answer as the x component Fx and the y component Fy (in Newton)

Fx=

Fy=

(c) At what angle θ0 will the falling ruler lose contact with the wall? (0≤θ0≤90∘; in degrees) [hint: the ruler loses contact with the wall when the force exerted by the wall on the ruler vanishes.]

## Answer This Question

## Related Questions

- Physics - A ruler stands vertically against a wall. It is given a tiny impulse ...
- Physics - Please Help - A ruler stands vertically against a wall. It is given a ...
- PHYSICS URGENT DR BOB - A ruler stands vertically against a wall. It is given a ...
- Classical Mechanics Physics - Urgent help please - A ruler stands vertically ...
- physics(HELP) - A ruler stands vertically against a wall. It is given a tiny ...
- PHYSICS(ELENA - A ruler stands vertically against a wall. It is given a tiny ...
- PHYSICS(HELP!!) - A ruler stands vertically against a wall. It is given a tiny ...
- Physics Classical Mechanics - A ruler stands vertically against a wall. It is ...
- Classical Mechanics Physics - A ruler stands vertically against a wall. It is ...
- PHYSICS(HELP) - A ruler stands vertically against a wall. It is given a tiny ...

More Related Questions