Momentum and Newton's Laws of Motion

# Momentum and Newton's Laws of Motion problem 40

Identify the correct and the incorrect statements in the list below:

• A body moves with uniform acceleration if the force on the body increases uniformly with time.

• A body moves with uniform deceleration if a constant force acts on the body in the opposite direction to its motion.

• If the mass of a body is reduced twice at the same force, the acceleration is also reduced twice.

• If the force acting on a body is ten times greater, the acceleration is also ten times greater.

• If a ship is moving uniformly and in a straight line, a constant force is acting on it.

• If a constant force acts on a body in the direction of motion, the body accelerates uniformly. If the force acts in the opposite direction, it decelerates uniformly.

• If the force on a body changes over time, the motion is non-uniform.

• If a car goes into a corner at a uniform speed, the resultant of the forces acting on the car is zero.

• A stone is thrown vertically upwards. When it reaches its maximum height, just before it begins to fall down, it stops for a moment. At this point, the resultant of the forces acting on the stone is zero.

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