A 76.5 kg cross-country skier skiing on unwaxed skis along dry snow at a constant speed of 4.00 m/s experiences a force of friction of -60.0 N. What is the coefficient of friction between unwaxed skis and dry snow?a. 0.08
b. 0.78
c. 1.28
d. 12.5

Answers

Answer 1

Answer: The force of friction = (weight) x (coefficient of friction)

Skier's weight = (mass) x (gravity) = (76.5) x (9.8) = 749.7 N

Force of friction = (749.7) x (coefficient of friction) = 60.0 N

Coefficient of friction = 60 / 749.7 = 0.08 (rounded)

Choice-'A' is the closest choice offered.

Related Questions

When_____forces act on an object, they cause the object to move.A. Balanced B. Unbalanced C. friction D net B?
A hot air balloon is moving vertically upwards at a velocity of 3m/s. A sandbag is dropped when the balloon reaches 150m. How long does the sandbag take to reach the ground and what is the maximum height it reaches?
Index fossils are the remains of species that were once abundant and
When the source of a sound is moving it's speed increases
Choose the best answer for each situation. a scientist with the epa examining water for contamination writes down that there was an iridescent sheen on the surface of the water. what type of data did the scientist record? a scientist needs to know the temperature of the water every 5 m along 3 km of the river. what tool would the scientist use?

What are non-examples of speed?

Answers

Sitting because when you sitting your not moving around so there fore you speed would be 0 barbecue your not putting in any work

Final answer:

Non-examples of speed include acceleration, direction, time, distance, inertia, momentum, and force. These concepts relate to other aspects of motion, not the rate of motion, which speed measures.

Explanation:

Non-examples of speed would be any factors or measures that don't directly pertain to the measurement of an object's change in position or distance over time. These could include factors such as acceleration, which involves the rate of change of speed; direction, which becomes a concern when we deal with velocity, not speed; and elements like time or distance separately.

For instance, projections about gravitational pull on vehicles while in motion would be non-examples because they relate more to the forces affecting the motion, rather than the motion itself. Similarly, an object's inertia or momentum, and the force applied to an object also do not exemplify speed, as they pertain to mass and force, not the rate of motion.

It's also essential to distinguish between instantaneous speed, average speed (total distance divided by elapsed time), and constant speed (speed that doesn't change over time). These are all variations of speed, but one concept isn't interchangeable with the others based on the context of the motion being described.

Learn more about Non-examples of Speed here:

brainly.com/question/265034

#SPJ2

In 2000, NASA placed a satellite in orbit around an asteroid. Consider a spherical asteroid with a mass of 1.50×1016 kg and a radius of 9.00 km .What is the speed of a satellite orbiting 4.60 km above the surface?

Answers

Answer:

8.58 m/s.

Explanation:

Given,

Mass of the asteroid,M = 1.50 x 10¹⁶ Kg

radius = 9 Km

distance of the satellite, r = 4.60 Km

Speed of the satellite = ?

R = 9 + 4.60 = 13.60 Km

Speed of the satellite rotating in orbit

$v = \sqrt{(GM)/(R)}$

G is gravitational constant

$v = \sqrt{(6.67* 10^(-11)* 1.50* 10^(16))/(13.60* 10^3)}$

v = 8.58 m/s

Speed of the satellite is equal to 8.58 m/s.

Which statements explain current theories about dark energy and dark matter? Check all that apply.(correct) Space that appears empty actually contains dark energy and dark matter.
(correct) Dark matter does not emit electromagnetic radiation.
Scientists believe dark energy will cause the universe to collapse inward to a single point.
(correct) Scientists theorize that dark energy is causing the expansion of the universe to accelerate.
Dark matter includes all of the dust, ice, and debris that scientists observe in black holes.

just trynna help out future students

Answers

Answer:

Space that appears empty actually contains dark energy and dark matter

Dark matter does not emit electromagnetic radiation

Scientists theorize that dark energy is causing the expansion of the universe to accelerate

Explanation:

According to the current theories about dark energy and dark matter, scientists theorize that dark energy is causing the expansion of the universe to accelerate as dark matter does not emit electromagnetic radiation. Moreover, the space that appears empty actually contains dark energy and dark matter.

Answer:

A, B, D or 1, 2, 4

Explanation:

i did it on edge hope it helps

Where is the error in this vent diagram A “parallel” and “perpendicular are switched
B The spring descriptions of motion are switched
C Particles travel along the wave in longitudinal waves
D Particles move long distances in transverse waves

Answers

A. Parallel and have a good day

What is the product of an object's mass and velocity?

Answers

That product is the object's momentum.
It has a direction ... the same direction as the velocity.

A cart is loaded with a brick and pulled at a constant speed along an inclined plane the the height of a seattop. If the mass of the loaded cart is 3.0 kg and the height of the seat top is 0.45 meters, then what is the potential energy of the loaded cart at the height of the seattop?

Answers

gravitational potential energy = mass (kg) x gravitational field strength (N/kg) x height (m)

Therefore,

3 x 0.45 x 10 = 13.5J <- it's joules because it's energy

Other Questions

The temperature of a sample of water increases from 20°c to 46.6°c as it absorbs 5650 calories of heat what is the mass of the sample?

Could someone please explain to me Archimede's principle without using the term displace (or at least explaining what it means)?

Identify the main renewable energy resources

The conclusion in your outline should include all of the following EXCEPTa. a topic sentence. b. a summary of key points. c. a restatement of your thesis. d. a deduction or inference about the information presented.