Homework Help: Physics

Posted by Bob Loblaw on Tuesday, October 30, 2012 at 7:06pm.

An object m is released from the top of an inclined, frictionless plane that is inclined at angle theta with the horizontal. The top of the ramp has height h. Which of the following would change the acceleration of the object if it were released from the top of the ramp?
a) changing the mass of the object
b) changing the angle theta of the inclined surface but not changing the height
c) increasing h but not changing theta
d) a and b
e) a and c
f) b and c
g) a, b and c

I'm thinking that it's e) but I'm not sure.

Physics - Anonymous, Tuesday, October 30, 2012 at 7:40pm
Summing the forces along the direction parallel to the inclined plane:

m*g*sin(theta) = m*a

a = g*sin(theta)

the acceleration is only dependent upon theta
Physics - Anonymous, Tuesday, October 30, 2012 at 7:43pm
Summing the forces along the direction parallel to the inclined plane:

m*g*sin(theta) = m*a

a = g*sin(theta)

the acceleration is only dependent upon theta

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