A force of 50 N is applied parallel to the displacement of a crate moved a distance of 8 meters across a floor. How much work is done?
Answer and explanation
Correct answer: A. 400 Joules
- Step 1: Work = Force Displacement cos(theta). Step 2. W = 50 N 8 m cos(0 deg) = 400 J. Answer: 400 Joules. Why not the others: 6.25 divides force by displacement.
Practise more Chemistry and Physics Principles.
Free questions with an explanation for every one, and full timed University of the Philippines College Admission Test mock tests.
More Chemistry and Physics Principles questions
- According to Newton's Second Law of Motion, what net force is required to accelerate a 1,200 kg vehicle at 2.5 m/s^2?
- What is the molar mass of sulfuric acid (H2SO4), given atomic masses H=1.0, S=32.1, and O=16.0 g/mol?
- What is the pH of a 0.001 M aqueous solution of hydrochloric acid (HCl), assuming complete dissociation?
- Under the Ideal Gas Law (PV = nRT), how does the volume of an ideal gas change if its absolute temperature is doubled while pressure remains…
- A car travelling at 20 m/s accelerates uniformly at 3 m/s^2 over a duration of 4 seconds. What is its final velocity?
- Which type of chemical bond involves the transfer of valence electrons from a metal to a non-metal, forming electrostatic lattice attraction…