The angular velocity of the cockroach does not change as long as it rotates with the disk it has the same angular velocity as the disk but by changing the distance from the center of the disk the linear velocity changes (V=r×ω) because the radius changes.
in order to find the kinetic energy you can use this formula k=1/2 × m × V²
so k/k0 = (V/V0)² = (r/r0)²
where the subscripts 0 denotes to the initial position of the cockroach so r0=2×r then we have k/k0=1/4
Answer:
v = 51.36 m/s
Explanation:
given,
mass of the car = 805 Kg
circumference of the track = 4.25 Km
Force on the car in circular path, F = 3140 N
tangential speed of the car = ?
2 π r = 4250
r = 676.4 m
using formula
v² = 2638.38
v = 51.36 m/s
hence, tangential speed of the car is equal to 51.36 m/s
Given Information:
Electric field = E = 180,000 N/C
Distance = r = 1.50 cm = 0.015 m
Required Information:
Charge = q = ?
Answer:
charge = q = 4.5x10⁻⁹ C
Explanation:
The electric field is given by
E = kq/r²
Where k is the coulomb constant k = 9x10⁹ Nm²/C²
q = Er²/k
q = 180,000*(0.015)²/9x10⁹
q = 4.5x10⁻⁹ C
Therefore, the charge is 4.5 nC
D.<span>moving at a constant speed of 150 km/h
Acceleration is the change in velocity.
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