What is one advantage of using primary source when doing research on an experiment

According to newtons universal law of gravitation, which would change the parh of the ball so it traces out widest curved path possible?

Astudent pushes on a 20.0 kg box with a force of 50 n at an angle of 30° below the horizontal. the box accelerates at a rate of 0.5 m/s2 across a horizontal floor. what is the value of the normal force on the box? 200 n 243 n 156 n 225 n

We put a force of 50n on an object and the acceleration is 100 m/s². what is the mass of the object?