At what speed does a trolley weighing 0.5 kg roll evenly if its impulse is 5 kg m / s?


m = 0.5 kilograms is the mass of a cart moving uniformly at a speed v;

p = 5 kg * m / s – the momentum of the moving cart.

It is required to determine v (meter per second) – the speed of the cart.

Since, according to the condition of the problem, the cart moves uniformly, in order to determine the speed of the cart, it is necessary to use the following formula:

p = m * v, from here we find that:

v = p / m = 5 / 0.5 = 1 / 0.1 = 10 meters per second.

Answer: the speed of the cart is 10 meters per second.

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