As a result, an increasing speed leads to an increasing momentum – a direct relationship. As the speed of an object increases, so does its velocity. TRUE – Momentum is calculated as the product of mass and velocity. Negative quantities move backwards or down, whereas positive quantities typically indicate the object is moving forward or up. In physics, direction is indicated by the sign, positive or negative. Momentum is a vector quantity, meaning it has both magnitude and direction. Alternatively, the centimeter per second (cm/s) can be used to express velocity magnitude. The standard unit of velocity magnitude (also known as speed ) is the meter per second (m/s). Velocity is a vector expression of the displacement that an object or particle undergoes with respect to time. The force acting on a body for short interval of time is called impulsive force. The product of the force & the time for which it acts on a body is called impulse of a force. For example, a bowling ball (large mass) moving very slowly (low velocity) can have the same momentum as a baseball (small mass) that is thrown fast (high velocity). Momentum can be thought of as the “power” when a body is moving, meaning how much force it can have on another body. Since impulse depends on momentum, it is also a vector quantity. Momentum is the product of mass and velocity therefore it is a vector quantity. Impulse is the average force over the time interval t. In classical mechanics, impulse (symbolized by J or Imp) is the integral of a force, F, over the time interval, t, for which it acts. When the golf ball is hit by the player, it receives a sudden change in momentum. When a football player kicks a ball suddenly with force, the ball shoots away. In the CGS system, if the mass is in grams and the velocity in centimeters per second, then the unit of momentum will be gram-centimeters per second (g⋅cm/s). Therefore, the unit for momentum can be Newton-second (Ns). Where, I = Impulse, m = Mass, ∆v = Velocity Change.The SI unit of impulse is Newton-seconds. This can be readily seen as a consequence of impulse being a change in momentum. Impulse determines the velocity of an object after a force acts on it. Impulse is equal to the change in momentum ( Δ p \Delta p Δp ) and is sometimes represented with the symbol J. Impulse ( F Δ t F \Delta t FΔt ) Product of the average force exerted on an object and the time interval during which the force is exerted.
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