A 2000 kg car accelerates from rest to a velocity of 20 m/s in 10 seconds. The power of the engine during this acceleration is
A. 50 kW.
B. 40 kW.
C. 30 kW.
D. 20 kW.
E. 10 kW.
B. 40 kW.
You might also like to view...
Microscopic properties of an object:
a. are just small versions of the macroscopic properties. b. are completely unrelated to macroscopic properties. c. are overall large scale properties. d. are the properties of particles that make up the object. e. are the average of many properties of individual particles.
If the velocity versus time graph of an object is a straight line making an angle of 30 degrees with the time axis, the object is
A) moving with constant non-zero speed. B) moving with constant non-zero acceleration. C) at rest. D) moving with infinite speed. E) none of the above
A car rounds a curve while maintaining constant speed. Which of the statements is correct?
A. The velocity of the car is constant B. The acceleration of the car is zero C. A net force acts upon the car D. No net force acts on the car E. The velocity of the car is zero
What is the ratio of radii of the nuclides 238 92U and 40 20Ca
A. 1.66 B. 2.44 C. 5.95 D. 1.80