# Relative Motion - Mechanical Engineering (MCQ) questions and answers

1)   A particle moving with respect to fixed frame of reference is called as __________

a. absolute motion
b. relative motion
c. rectilinear motion
d. none of the above
 Answer  Explanation ANSWER: absolute motion Explanation: No explanation is available for this question!

2)   A boat sails across a river with a velocity of 10 km/hr. If resultant boat velocity is 14 km/hr, then what is the velocity of river water?

a. 17.20 km/hr
b. 10 km/hr
c. 9.79 km/hr
d. 4.88 km/hr
 Answer  Explanation ANSWER: 9.79 km/hr Explanation: No explanation is available for this question!

3)   What are the limitations of string law?

a. Direction of motion cannot be specified
b. Valid only when more than three particles are connected by a single string
c. Both a. and b.
d. None of the above
 Answer  Explanation ANSWER: Direction of motion cannot be specified Explanation: No explanation is available for this question!

4)   Two cars X and Y move on adjacent roads in opposite directions. If velocity of car X and Y is 80 km/hr and 60 km/hr respectively, then what will be the relative velocity of car X w.r.t. Y?

a. 70 km/hr
b. 100 km/hr
c. 140 km/hr
d. Insufficient data
 Answer  Explanation ANSWER: 140 km/hr Explanation: No explanation is available for this question!

5)   In 5 seconds a body covers a distance of 50 m and in 10 seconds it covers 80 m with uniform acceleration. What is the distance traveled in 15 seconds?

a. 100 m
b. 110 m
c. 1000 m
d. None of the above
 Answer  Explanation ANSWER: 110 m Explanation: No explanation is available for this question!