What is the kinetic energy of an automobile of mass travelling at a constant speed of ?
Answer and explanation
Correct answer: C. 200,000 J
- Step 1: Recall the formula for translational kinetic energy: .
- Step 2: Substitute values: .
Answer
200,000 J.
Why not the others: '10,000 J' computes ; '40,000 J' computes ; '400,000 J' omits the factor of .
Practise more Mechanics, Waves, Thermodynamics and Electromagnetism.
Free questions with an explanation for every one, and full timed Tahsili SAAT (Saudi Arabia) mock tests.
More Mechanics, Waves, Thermodynamics and Electromagnetism questions
- An object accelerates uniformly from rest at along a straight line. What distance does it cover in ?
- A force of acts on a cart of mass on a frictionless horizontal floor. What is the acceleration produced?
- According to Newton's universal law of gravitation, if the distance between two point masses is tripled, how does the gravitational attracti…
- A sound wave travels through air at with a frequency of . What is the wavelength of this sound wave?
- A ray of light in air strikes a glass plate at an angle of incidence of . If the refractive index of the glass is and…
- Two point charges of and are separated by a distance . If both charges are doubled in magnitude while the dis…