You can calculate the speed of the ball by the distance it travels divided by the time.
Length of string = 2m
Circumference of circle = 2*radius*π = 4*pi = ~12.6 meters
Speed = distance/time = 12.6m/2s = 6.28m/s
Acceleration = V²/R where the velocity at any one point is the same as the speed.
acceleration = (6.28)²/2 = ~19.72m/s²
Force can be expressed as the time-rate change of momentum
Mathematically, Force = Change in momentum/change in time
Change in momentum = m(10.1-18.9) = -0.2024
Force = -2024/5.4 = -375N(approx)
The significance of the '-' sign is that the direction of force is the opposite that of the direction of our velocities since we assumed them to be positive.
Also this is the force on the ball, the force on the window will be equal and opposite.
W=Fd
W is work
F is force in newtons
D is displacement in meters
W= 25 x 3
W= 75Nm
Silicates that are composed of infinite chains of tetrahedrons are called inosilicates; single chains have a unit composition of SiO 3 or Si 2 O 6, whereas double chains contain a silicon to oxygen ratio of 4:11. Phyllosilicates, or sheet silicates, are formed when three oxygen atoms are shared with adjoining tetrahedrons.
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