m g sin theta
4 * 9.81 * (1/2)
about 19.6 N
A block of mass 4 kg slides down a frictionless inclined plane angled 30 degrees above the horizontal. The force accelerating the block down the plane is thus:
a. zero, since there is no friction
b. 9.8N
c. 19.6N
d. 33.9N
e. 39.2N
1 answer