By Ignoring air resistance, the coefficient of Kinetic friction between the sidewalk and the metal sled runners is 0.69
FRICTION
Friction is a force that opposes motion.
Given that Gwen exerts a 36 N horizontal force as she pulls a 52 N sled across a cement sidewalk at constant speed
- At constant speed, acceleration a = 0
- The weight = Normal reaction N = 52
From Newton's law,
Sum of forces = ma
That is,
F - 
= ma
Where = frictional force
F - = 0
F = = 36 N
= μN
Where μ = coefficient of kinetic friction
36 = μ x 52
μ = 36/52
μ = 0.69
Therefore, the coefficient of Kinetic friction between the sidewalk and the metal sled runners is 0.69 when we Ignore air resistance.
Learn more about Friction here: brainly.com/question/24338873
Many scientist believed the ocean floor is FLAT
Answer:
F = 7 N
Explanation:
given,
mass of sled = 17.5 Kg
speed of snow on horizontal surface = 3.5 m/s
time taken to stop = 8.75 s
initial momentum
= m U
= 17.5 x 3.5 = 61.25 Kg.m/s
final momentum
final velocity = 0 m/s
final momentum = 0
impulse = change in momentum
impulse = force x time
equating both the formula of impluse
F x t = 61.25 - 0
F x 8.75 = 61.25
F = 7 N
Force acting on the moving sled is equal to F = 7 N
Answer:As an object speeds up, the total energy increases / decreases / remains the same. As an object slows down, the total energy increases / decreases / remains the same.
Explanation:
Explanation:
Given that,
Mass of the cart, 
Mass of the cart 2, 
Final speed of cart 2, 
Final speed of cart 1 is 0 as it comes to rest.
Let us assume that the initial velocity of the cart 2 is 0. So using the conservation of linear momentum as :
So, the initial velocity of the 1.0-kg cart is 0.9 m/s.
