With the presence of science during the scientific revolution, people were no longer very permissive to ideas about nature that were solely based on someone's perception. It should be scientifically studied and have undergone scientific method for it to be generally accepted as true.
D. Gravitational Force
because if the object is heavy and it is higher above the ground the more gravitational energy it holds it increases as weight and height increases
initial angular speed is given as 20 rev/second
so it is given as
now it comes to rest after 80 s
now we can use kinematics to find angular deceleration
so angular deceleration is 1.57 rad/s^2
Answer:
b : 60m
Explanation:
when a plane mirror is placed horizontally on a level ground at a distance of 60m from the top of tower as shown in figure. a/c to question, The top of tower and its image in the mirror subtend an angle of 90° at the eyes. so, angle made by top of tower and horizontal line is 45° as