Any external force that acts against movement is called . A. Gravity B. Efficiency C. Resistance D. Momentum Please select the best answer from the choices provided. A B C D.

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

Explain what happens at the saturation point when adding salt to water at room temperature.

If there's a small amount of friction between two surfaces, the result could be select all that applya. no movement b. heatc. a little bit of movementd. sliding around