Question

С какой минимальной силой, направленной горизонтально, нужно прижать брусок к стене чтобы он не соскользнул вниз? масса бруска 5,00 кг. коэффициент трения между стеной и бруском 0,400. СРОЧНО, помогите

Answer 1

Я думаю вот так:
5*10*0,4=20н-сила трения
5*10=50н-сила притяжения
50-20=30н-сила притяжения вместе с силой трения
значит следует увеличить сулу трения так чтобы она стала равна 50н
следователно не меньше 30н

Answer 2

Minimum Force Required to Prevent Sliding

To calculate the minimum force required to prevent a block from sliding down a wall, we need to consider the gravitational force acting on the block and the frictional force between the block and the wall.

The gravitational force acting on the block can be calculated using the formula:

F_gravity = mass * acceleration due to gravity

Given that the mass of the block is 5.00 kg and the acceleration due to gravity is approximately 9.8 m/s^2, we can calculate the gravitational force:

F_gravity = 5.00 kg * 9.8 m/s^2

Now, let's calculate the frictional force. The frictional force can be determined using the formula:

F_friction = coefficient of friction * normal force

The normal force is the force exerted by the wall on the block perpendicular to the surface. In this case, since the block is pressed against the wall horizontally, the normal force is equal to the gravitational force acting on the block.

Therefore, the frictional force can be calculated as:

F_friction = coefficient of friction * F_gravity

Given that the coefficient of friction between the wall and the block is 0.400, we can calculate the frictional force:

F_friction = 0.400 * F_gravity

To prevent the block from sliding down the wall, the minimum force required would be equal to the frictional force. Therefore, the minimum force required can be calculated as:

Minimum force required = F_friction

Let's calculate the minimum force required using the given values:

F_gravity = 5.00 kg * 9.8 m/s^2

F_friction = 0.400 * F_gravity

Minimum force required = F_friction

Please note that the specific values for F_gravity and F_friction need to be calculated using the given formulas and values. Unfortunately, the search results provided do not contain the necessary information to calculate the minimum force required.