Question

Мячик. Которому придали скорость 5м/с прокатился 10м и остановился. Найти массу мячика если сила сопротивления действ на мячик была равна 2 Н

Answer 1

Кинетическая энергия мячика=работе силы сопротивления.
mv^2/2=Fc*s
Отсюда масса m=Fc*s*2/(v^2)=2*10*2/25=1,6 кг.

Answer 2

Calculation of the Mass of the Ball

To find the mass of the ball, we can use the equation of motion that relates force, mass, and acceleration. In this case, the force acting on the ball is the force of resistance, which is given as 2 N. The acceleration of the ball can be calculated using the equation of motion:

F = m * a

where: - F is the force acting on the ball (2 N) - m is the mass of the ball (unknown) - a is the acceleration of the ball

Since the ball comes to a stop, the acceleration is equal to the negative of the initial velocity divided by the distance traveled:

a = (-v^2) / (2 * d)

where: - v is the initial velocity of the ball (5 m/s) - d is the distance traveled by the ball (10 m)

Substituting the values into the equation, we get:

2 N = m * ((-5 m/s)^2) / (2 * 10 m)

Simplifying the equation, we have:

2 N = m * 12.5 kg m/s^2

Now, we can solve for the mass of the ball:

m = 2 N / 12.5 kg m/s^2

Calculating the value, we find:

m ≈ 0.16 kg

Therefore, the mass of the ball is approximately 0.16 kg.