We will find the mass from
mass = density x volume
We are told the density and must find the volume from the dimensions given
the volume of the washer will be the area x thickness (remembering to convert all measurements to meters)
if the washer had no hole, its area would be pi (0.0225m)^2 (remember to convert to meters and to use radius)
the area of the hole is pi(0.00625m)^2
so the area of the washer is pi[(0.0225m)^2 - (0.00625m)^2] = 1.5x10^-3 m
the volume of the washer is 1.5x10^-3 m x 1.5x10^-3 m = 2.25x10^-6 m^3 (the thickness of the washer is 1.5 mm = 1.5x10^-3m)
thus, the mass of the washer = 8598kg/m^3 x 2.25x10^-6m^3 = 0.0189kg = 18.9 grams
Answer:
u = 5 m/s
Explanation:
given,
Mass of ice skater, M = 45 Kg
initial speed = 0 m/s
mass of the ball, m = 5 Kg
velocity of skater and the ball,V = 0.5 m/s
speed of the ball = ?
using conservation of momentum
m u + M u' =( M + m ) V
initial speed of ice skater is zero
5 x u + 45 x 0 =( 45 + 5 ) V
5 u = 50 x 0.5
5 u = 25
u = 5 m/s
hence, the speed of the ball is equal to 5 m/s
Answer:
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There is a frictional force between two objects that are not in relative motion. Such a force is called the static friction force.</h2><h2>
There is a frictional force between two objects that are not in relative motion. Such a force is called the static friction force....</h2><h2>
There is a frictional force between two objects that are not in relative motion. Such a force is called the static friction force....Friction coefficients.</h2><h2>
There is a frictional force between two objects that are not in relative motion. Such a force is called the static friction force....Friction coefficients.MATERIAL S K</h2><h2>
There is a frictional force between two objects that are not in relative motion. Such a force is called the static friction force....Friction coefficients.MATERIAL S KMetal on leather 0.6 0.5</h2><h2>
There is a frictional force between two objects that are not in relative motion. Such a force is called the static friction force....Friction coefficients.MATERIAL S KMetal on leather 0.6 0.5Wood on leather 0.5 0.4</h2><h2>
There is a frictional force between two objects that are not in relative motion. Such a force is called the static friction force....Friction coefficients.MATERIAL S KMetal on leather 0.6 0.5Wood on leather 0.5 0.4Rubber on concrete, dry 0.9 0.7</h2><h2>
There is a frictional force between two objects that are not in relative motion. Such a force is called the static friction force....Friction coefficients.MATERIAL S KMetal on leather 0.6 0.5Wood on leather 0.5 0.4Rubber on concrete, dry 0.9 0.7wet 0.7 0.57</h2>
Explanation:
<h2>Greetings, I'm from my beloved Mexico</h2>
