A mass of m = 1 kg on a frictionless surface is observed to accelerate at a = 10 m/s2 at an angle of 60o east of north as shown in the top down view picture below. F2= 5 N and is directed directly upward. Determine the magnitude of F1 if it acts directly to the right.

the motion of a pendulum is a classic example of mechanical energy conservation. a pendulum consists of a mass (known as a bob ) attached by a string to a pivot point. as the pendulum moves it sweeps out a circular arc, moving back and forth in a periodic fashion.

the only real purpose of sputnik 1 was to beat the us into space. we were getting close to launching a useful satellite, explorer 1 - which launched on january 31, 1958. the ussr had to beat that, so they launched sputnik 1 on october 4, 19

i think its c if i'm wrong