Post Utme Physics Past Questions and Answers

Question 486:

Which of these gives the dimension oft orque?

A. MLT
B. ML-1T
C. ML-1T-2
D. ML2T-2

Question 487:

An object of mass 80 kg is kicked above the ground and in 20 s it has reached a height of 600 cm.
Calculate the power of the object.

A. 40 W
B. 240 W
C. 402 W.
D. 204 W

Question 488:

Which of these statements is true?

A. Energy cannot be destroyed and cannot be transformed from one form to anothe
B. Momentum before impact is not necessarily equal to the momentum after impact
C. Impulse the product of force and time
D. In perfectly elastic collision, there is a small loss of energy.

Question 489:

A load of 2 tonnes is raised with 10 N efforts. Calculate the mechanical advantage of the machine with which the load is raised

A. 200 N
B. 0.20 N
C. 2000
D. 102

Question 490:

An object of mass 4000 g is 60 cm above the ground. Calculate its kinetic energy 50 cm above the ground (Take g = 10 m/s2)

A. 4J
B. 40J
C. 4N
D. 40 N