Needed
number 3 is what?
number 2 is what?
number 1 is what ?
question 28 options:
the amplitude
the frequency
the trough
the wavelength

Modify the equation fδt=δ (mv) to find the force of friction.

The percent efficiency of a machine can never be 100% (or greater), because in the real world some energy is always converted into a. heat b. work c. input force d. output force

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