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Alina [70]
3 years ago
14

A heavy sled and a light sled, both moving horizontally with the same speed, suddenly slide onto a rough patch of snow and event

ually come to a stop. The coefficient of kinetic friction between the sleds and the rough snow is the same for both of them.
Which of the following statements about these sleds are correct?

A) Both sleds will slide the same distance on the rough snow before stopping.

B) The heavy sled will slide farther on the rough snow than the light sled.

C) The light sled will slide farther on the rough snow than the heavy sled.

D) The friction from the snow will do the same amount of work on both sleds.
Physics
2 answers:
Alex777 [14]3 years ago
5 0

Answer:

A) Both sleds will slide the same distance on the rough snow before stopping.

D) The friction from the snow will do more negative work on the heavy sled than on the light sled.

Explanation:The coefficient of kinetic friction is the ratio of the force of friction of a given object or material to the normal force acting on it,it depends mainly on the nature of the surface in consideration. The higher the roughness of a surface is, the higher the coefficient of kinetic friction. For an object at rest on a plane surface with no other force acting on it,the normal force will be considered as the force of gravity.

maria [59]3 years ago
4 0

Answer:

The correct answers is option A) "Both sleds will slide the same distance on the rough snow before stopping".

Explanation:

For objects moving horizontally at the same speed, an equal coefficient of kinetic friction would mean that both objects will move the same distance before stopping, independently of their mass. The coefficient of kinetic friction is obtain from dividing the force needed to pull an object between the force that holds or prevents the object from moving. The coefficient of kinetic friction is a dimensionless scalar, which means that is independent of the size of the object because it depends only in the forces that act upon it.

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A sled slides down a hill, reaches the level surface, and eventually comes to a stop. Which fact ultimately explains why the sle
Kitty [74]

Answer:

B. The presence of an unbalanced force(e.g friction) causes a moving object to stop.

Explanation:

As the friction is that force that can stop the sled upon reaching the levelled surface so the option b is correct.

7 0
3 years ago
A sky diver, with parachute unopened, falls 625 m in 15.0 s. Then she opens her parachute and falls another 362 m in 139 s. What
Jobisdone [24]

Answer:

v_{avg} = 6.41 m/s

Explanation:

Average velocity is defined as the ratio of total displacement of the motion and total time taken in that motion

here we know that initially the sky diver drops without opening parachute by total displacement 625 m

then she open her parachute and drop another 362 m

so first it took time t = 15 s to drop without open parachute

then it took t = 139 s to drop next displacement

so here total displacement is given as

d = 625 m + 362 m

total time is given as

t = 15 s + 139 s

so average velocity is given as

v_{avg} = \frac{625 + 362}{15 + 139}

v_{avg} = 6.41 m/s

4 0
3 years ago
A 25 kg child is riding on a swing. If the child travels 8.9 m/s at the bottom of their swing, how high into the air is the chil
Setler [38]

Answer:

h = 4.04 m

Explanation:

Given that,

Mass of a child, m = 25 kg

The speed of the child at the bottom of the swing is 8.9 m/s

We need to find the height in the air is the child is able to swing. Let the height is h. Using the conservation of energy such that,

mgh=\dfrac{1}{2}mv^2\\\\h=\dfrac{v^2}{2g}

Put all the values,

h=\dfrac{(8.9)^2}{2\times 9.8}\\\\h=4.04\ m

So, the child is able to go at a height of 4.04 m.

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Why is radiation fog more likely near the center of an anticyclone than near the center of a cyclone?
Zigmanuir [339]
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4 0
3 years ago
Please help! Will give thanks and branliest!!!!
slamgirl [31]
<span>The two factors that act on parachutes are gravity and air resistance, which is also called drag. Gravity acts as a force to pull parachutes down to the surface of the Earth, while air resistance generates movement in the opposite direction of the falling parachute, and essentially pushes the parachute upward. hope this helps!:)</span>
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3 years ago
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