If the work done on an object doubles its kinetic energy how is the speed of the object
1 answer:
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Answer:
<h3>The answer is 3 kg</h3>Explanation:
The mass of the object can be found by using the formula
f is the force
a is the acceleration
From the question we have
We have the final answer as
<h3>3 kg</h3>Hope this helps you
Answer:
(a)
(b)
(c)
(d)
Solution:
As per the question:
Angular velocity,
Time taken by the wheel to stop, t = 2.4 h =
Distance from the axis, R = 38 cm = 0.38 m
Now,
(a) To calculate the constant angular velocity, suing Kinematic eqn for rotational motion:
= final angular velocity
= initial angular velocity
= angular acceleration
Now,
Now,
(b) The no. of revolutions is given by:
(c) Tangential component does not depend on instantaneous angular velocity but depends on radius and angular acceleration:
(d) The radial acceleration is given by:
Linear acceleration is given by:
Answer:
3.12 x 10^-5 m
Explanation:
Length of steel column, L = 4 m
diameter, d = 0.2 m
radius = half of diameter = 0.1 m
Young's modulus, Y = 2 x 10^11 N/m^2
Mass of truck, m = 5000 kg
Force, F = mass of truck x acceleration due to gravity
F = 5000 x 9.8 = 49000 N
Area of crossection of cable,
A =
Let ΔL be the shrink in length of cable, then by the formula of Young's modulus
ΔL = 3.12 x 10^-5 m
Thus, the shrink in the length of cable is 3.12 x 10^-5 m.