Calculate the weight of a 75 kg object near the Earth's surface (take g = 9,8 m·s⁻²).
Answer and explanation
Correct answer: A.
- Step 1: .
- Step 2: N.
Answer
.
Why not the others: : mass was divided by g instead of multiplied. : the mass in kg was used as the weight in newtons. : g was applied twice.
Practise more Mechanics: forces, energy and momentum.
Free questions with an explanation for every one, and full timed South Africa Matric mock tests.
More Mechanics: forces, energy and momentum questions
- A book rests on a table. Why are the weight of the book and the normal force of the table NOT a Newton's third-law action-reaction pair?
- A passenger lurches forward when a moving bus brakes suddenly. Which law or principle best explains this?
- A skydiver falling through air reaches terminal velocity when
- In which situation is the total linear momentum of a system conserved?
- In an elastic collision between two objects,
- According to the work-energy theorem, the net work done on an object is equal to