Answer: w = 4.38rad/s
Therefore the initial speed is 4.38rad/s
Explanation:
Given;
Angular distance = 5.7rad
Time = 2.6sec
When moving at constant angular acceleration, the angular distance covered can be given as;
d = ((w0 + w1)/2)t .....1
Where d = angular distance = 5.7rad
w = initial angular speed
w1 = final angular speed = 0
t = time of change. = 2.6 s
Substituting to equation 1 we have;
5.7 = ((w+0)/2)×2.6
w = 5.7×2/2.6
w = 4.38rad/s
Therefore the initial speed is 4.38rad/s
Answer:
a)
b)
Explanation:
a) The displacement of the first object is 22.5 m, so we can use the next equation:
positive acceleration.
b) Using the same equation we can find the second value of the acceleration:
positive acceleration.
I hope it helps you!
Answer:
204 kJ
Explanation:
Heat energy can be calculated using
Q=mcθ
where Q = Heat energy
m =mass
c = specific heat capacity
θ =temperature difference
Q = 12 * 1700*10
= 204000 J
= 204 kJ
Answer:
It’s mass would be the same
Explanation:
Mass and weight are often used interchangeably in everyday conversation. For example, our medical records often show our weight in kilograms but never in the correct units of newtons. In physics, however, there is an important distinction. Weight is the pull of Earth on an object. It depends on the distance from the center of Earth. Unlike weight, mass does not vary with location. The mass of an object is the same on Earth, in orbit, or on the surface of the Moon.