Which of the following statements is correct according to Newton's first law of motion?
An object at rest remains at rest unless acted upon by a net force.
An object in motion eventually comes to a halt.
An object in motion moves in a parabolic trajectory unless acted upon by a net force.
If an object at rest is acted upon by a force, it must move.
An object slides on a level surface in the +x direction. It slows and comes to a stop with a constant acceleration of -2.45 m/s². What is the coefficient of kinetic friction between the object and the floor?
4.9
0.50.
0.25.
Impossible to determine without knowing the mass of the object
A person on a scale rides in an elevator. If the mass of the person is 60.0 kg and the elevator accelerates upward with an acceleration of 4.90 m/s², what is the reading on the scale?
882 N.
588 N.
294 N.
147 N.
