Question

- A sled of mass 75 kg is at rest on flat, snow-covered ground. Friction cannot be ignored.

Write down givens?
What does the sled weigh ? (Written kg and N)
What is the normal force and how do you know ?
If you want to calculate the force of static friction, what two physical quantity do you need ?

Calculate the force of static friction ?

What would you say about the force you need to get this lead to move? Explain.

Answer 1

The weight of the sled is 735 N and the normal force is also 735 N because the sled is at rest on a flat surface. The force of static friction cannot be calculated without the coefficient of static friction.

Step-by-step explanation:

The given information for the sled is:

• Mass of the sled: 75 kg

If the sled is at rest on flat, snow-covered ground, the weight of the sled can be calculated using the formula:

Weight = mass x gravity

Weight = 75 kg x 9.8 m/s^2

Weight = 735 N

The normal force on the sled is equal to the weight of the sled, which is 735 N. This is because when an object is at rest on a flat surface, the normal force from the surface must balance the weight of the object.

To calculate the force of static friction, you need the coefficient of static friction and the normal force. Given that friction cannot be ignored, the force of static friction can be calculated using the formula:

Force of static friction = coefficient of static friction x normal force

However, the coefficient of static friction was not provided, so it is not possible to calculate the force of static friction.