A horizontal force of 100 N pushes a 12-kg block up a frictionless incline that makes an angle of 25° with the horizontal. (Use g = 9.81 m/s2.)
1. What is the normal force, in Newtons, that the incline exerts on the block? Round your answer to two significant figures.
2. What is the magnitude of the acceleration of the block in m/s2? Round your answer to one decimal place.
The Attempt at a Solution
1. I got it as 117.72. Is it right? And if it's right how do I round to 2 significant figures.
2. I don't know how to find acceleration.