A block of ice is sliding down a ramp with a constant acceleration of 4.9 m/s^2. What is the angle between the slope of the ramp and the horizontal? Assume the force of friction is not significant

Question

michele_laino · Answer

please note that, the acceleration "a" of a body which is sliding on a ramp whose angle with respect to the horizontal is alpha, has the subsequent value:
$$a=g*\sin \alpha $$
whre g=9.806 m/sec^2
|dw:1418416722954:dw|

michele_laino · Answer

please substitute your value of a in the above equation, and solve for sin Alpha
@chuckman

anonymous · Answer

$$4.9=9.806\times \sin a???$$

michele_laino · Answer

that's right!

anonymous · Answer

is it 30?

michele_laino · Answer

that's right!

anonymous · Answer

i mean my bad wrong question answers

anonymous · Answer

i was looking at the wrong question

michele_laino · Answer

sorry from the text I read that angle is required!

anonymous · Answer

yeah, it's 30 degrees

michele_laino · Answer

ok!

anonymous · Answer

what about:

The mass of a stroller and the child it carries is 21.1 kg. A woman pushes the stroller with a force of 121 N at an angle of 41.0 degrees to the vertical. The stroller experiences a friction force of 4.0 N. What is the stroller's acceleration forward?

michele_laino · Answer

please note that, on your stroller are acting three forces,see below:
|dw:1418417425369:dw|
do you agree?