science
Grade-7
Easy
Question
Sam kicks a football; it moves 20 m. His son Lee kicks the same football; it moves 17 m. Who applied a greater force? To what kind of force was the football subjected?
- Sam, balanced force
- Lee, balanced force
- Sam, unbalanced force
- Lee, unbalanced force
Hint:
When the resultant force acting on a body is not equal to zero, the forces acting on the body are known as unbalanced forces.
The correct answer is: Sam, unbalanced force
Sam applied a greater force than Lee as ball covered more distance. The base units relevant to force are unit of length and mass. As the ball from rest moved to a certain distance, the force applied should be greater than zero. Hence, we can say that it's an unbalanced force.
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