if the distance an object moves each second changes, the object is said to be speed. Please Help!

Which law represents the thermodynamic statement of the conservation of energy of a system? a. the fourth law b. the first law c. the second law d. the third law

Determine the maximum r-value of the polar equation r =3+3 cos 0

Polly is pushing a box across the floor with a force of 30 n. the force of gravity is –8 n, and the normal force is 8 n. which value could describe the force of friction if polly could not move the box?