Q A man throws a ball weighing 500g vertically upwards witha speed of 10m/s.
1) what will be its initial momentum?
2) What would be its momentum at the highest point of his flight?
1. M = mV = 0.5 * 10 = 5.
2. M = mV = 0.5 * 0 = 0.
Thank
To answer these questions, we need to understand the concept of momentum. Momentum (p) is defined as the product of an object's mass (m) and its velocity (v). Both questions require the calculation of momentum at different points of the ball's motion.
1) To find the initial momentum, we need to determine the mass and velocity of the ball. In the given scenario, the ball's mass is 500g, which can be converted to kilograms (kg) by dividing it by 1000 (1kg = 1000g). So, the mass (m) of the ball is 0.5 kg. The ball is thrown vertically upwards with a speed (velocity) of 10 m/s. Therefore, the initial momentum (p) is calculated by multiplying the mass by the velocity: p = m * v = 0.5 kg * 10 m/s = 5 kg*m/s.
2) At the highest point of its flight, the ball momentarily stops moving vertically. Therefore, its velocity (v) at that point is 0 m/s. However, the mass remains the same at 0.5 kg. Using the same formula as before, we can calculate the momentum at the highest point: p = m * v = 0.5 kg * 0 m/s = 0 kg*m/s.
To summarize:
1) The initial momentum of the ball is 5 kg*m/s.
2) The momentum at the highest point of its flight is 0 kg*m/s.