Question

Навантажені санчата загальною массою 25 кг рівномірно переміщують по снігу. Коефіціент тертя ковзання між санчатами і снігом складує 0,15. Яку силу прикладають до санчат? Чому цьому дорівює сила тертя ковзання ?

Answer 1

Ответ:

ответ на фото

Объяснение:

Answer 2

Calculating the Force Applied to the Sled and the Force of Friction

To calculate the force applied to the sled and the force of friction, we can use the following formulas:

1. The force applied to the sled can be calculated using the formula: Force = Mass x Acceleration

2. The force of friction can be calculated using the formula: Frictional Force = Coefficient of Friction x Normal Force

Given: - Mass of the sled (m) = 25 kg - Coefficient of friction (μ) = 0.15

Calculating the Force Applied to the Sled

The force applied to the sled can be calculated using the formula: Force = Mass x Acceleration

Since the sled is moving at a constant speed, the acceleration is zero. Therefore, the force applied to the sled can be calculated as: Force = Mass x Acceleration = 25 kg x 0 m/s^2 = 0 N

So, the force applied to the sled is 0 Newtons.

Calculating the Force of Friction

The force of friction can be calculated using the formula: Frictional Force = Coefficient of Friction x Normal Force

In this case, the normal force is equal to the weight of the sled, which can be calculated as: Weight = Mass x Acceleration due to gravity

Given: - Acceleration due to gravity (g) = 9.81 m/s^2

Weight = Mass x Acceleration due to gravity = 25 kg x 9.81 m/s^2 = 245.25 N

Now, we can calculate the force of friction: Frictional Force = Coefficient of Friction x Normal Force = 0.15 x 245.25 N = 36.7875 N

So, the force of friction is approximately 36.79 Newtons.

Conclusion

The force applied to the sled is 0 Newtons because the sled is moving at a constant speed. The force of friction acting on the sled is approximately 36.79 Newtons. This force of friction opposes the motion of the sled on the snow, making it more difficult to move.