# GENERAL KNOWLEDGE

## GK

### PHYSICS

 Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
A boat is travelling at a steady speed in a straight line across the surface of a lake. Which statement about the boat is correct?
 A The resultant force on the boat is in the direction of motion. B The resultant force on the boat is in the opposite direction to its motion. C The resultant force on the boat is vertically downwards. D The resultant force on the boat is zero.
Explanation:

Detailed explanation-1: -A boat is travelling at a steady speed in a straight line across the surface of a lake. Which statement about the boat is correct? A The resultant force on the boat is in the direction of motion.

Detailed explanation-2: -FACT If moving at a constant velocity, or at rest, the resultant force is zero. This is because resultant force=massx acceleration. Resultant force causes acceleration, not constant velocity. When velocity is constant or the object is at rest, the acceleration is zero so the resultant force is zero.

Detailed explanation-3: -Newtonâ€™s first law of motion Whenever forces acting on an object are unbalanced, there will be a resultant force which will cause the speed of the object to change in the direction of the resultant force.

Detailed explanation-4: -When an object travels in a straight line and covers the same distance simultaneously, it is said that the object is in uniform motion. Simply, the rate of change in velocity will always remain constant in the case of uniform acceleration.

There is 1 question to complete.