a 12-kg block is pulled by a string at a 30 degree angle. if the string exerts a 50 n force, the block accelerates at 4.13 m/s2. what is the frictional force and normal force exerted on the block?

Let, frictional force is f and normal force is N.

Balancing horizontal forces :

Also, balancing vertical forces, we get :

Therefore, the frictional force and normal force is -6.26 N and 142.6 N.

layers of the earth affect the waves and these effects are seen on instruiments such as seimometers

the higher the current the higher the mag field around it the higher the influence on the compass