Answer:
35.1688 seconds
Explanation:
M = Mass of sphere = 8200 kg
R = Radius of sphere = 90 cm
F = Force = 30 N
Moment of inertia is given by
Torque is given by
For one rotation
The time taken to rotate the sphere from rest is 35.1688 seconds
A particle with charge 8 µC is located on the x-axis at the point −10 cm , and a second particle with charge 3 µC is placed on t
1 answer:
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Answer:
10.86 N
Explanation:
Let the average frictional force acting on the toboggan be 'f' N.
Given:
Mass of toboggan (m) = 19.0 kg
Initial velocity (u) = 4.00 m/s
Final velocity (v) = 0 m/s
Time for which friction acts (Δt) = 7.00 s
Now, change in momentum is given as:
Now, we know that, change in momentum is equal to the impulse acting on the body. So,
Impulse is,
Now, we know that, impulse is also given as the product of average force and the time interval for which it acts. So,
Rewriting the above equation in terms of 'f', we get:
Plug in the given values and solve for 'f'. This gives,
Therefore, the magnitude of frictional force is