When the speed of a moving body is doubled?a)Its acceleration is doubledb)Its momentum is doubledc)Its kinetic energy is doubledd)Its potential energy is doubledCorrect answer is option 'B'. Can you explain this answer?

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EmSAT Achieve Exam > EmSAT Achieve Questions > When the speed of a moving body is doubled?a)...

When the speed of a moving body is doubled?

a)
Its acceleration is doubled
b)
Its momentum is doubled
c)
Its kinetic energy is doubled
d)
Its potential energy is doubled

Correct answer is option 'B'. Can you explain this answer?

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When the speed of a moving body is doubled?a)Its acceleration is doubl...

Momentum is a vector quantity; it has both magnitude and direction.
Isaac Newton’s second law of motion states that the time rate of change of momentum is equal to the force acting on the particle.
Momentum can be calculated by multiplying the mass of an object by its forward velocity. (mv = kg*m/s).
Mass and velocity are both directly proportional to the Momentum.
- If you increase either mass or velocity, the Momentum of the object increases proportionally.
- If you double the mass or velocity, you double the Momentum.
- If you halve the mass or velocity, you half the Momentum.
Newton's laws of motion-
- Newton’s first law states that if a body is at rest or moving at a constant speed in a straight line, it will remain at rest or keep moving in a straight line at constant speed unless it is acted upon by force. This postulate is known as the law of inertia.
- Newton’s second law is a quantitative description of the changes that a force can produce in a body's motion. It states that the time rate of change of a body's momentum is equal in both magnitude and direction to the force imposed on it. The momentum of a body is equal to the product of its mass and its velocity.
- Newton’s third law states that when two bodies interact, they apply forces to one another equal in magnitude and opposite in direction. The third law is also known as the law of action and reaction. This law is important in analyzing static equilibrium problems, where all forces are balanced, but it also applies to bodies in uniform or accelerated motion.

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When the speed of a moving body is doubled?a)Its acceleration is doubledb)Its momentum is doubledc)Its kinetic energy is doubledd)Its potential energy is doubledCorrect answer is option 'B'. Can you explain this answer?

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