Question

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A car is moving with a speed 54 km/hr. The radius of the wheels is 10 cm. After application of brakes, the wheels come to rest in 10 rotations.
The angular retardation produced by the brakes is
0 61 rad/s2
0
260 rad/s2
0 151 rad/s2
O 179 rad/s2​

Answer 1

Answer:

10. A capsule of medicine is in the shape of a sphere of diameter 3.5mm. How much medicine (in mm3) is needed to fill this capsule? (Assume π = 22/7)

Solution:

Diameter of capsule = 3.5 mm

Radius of capsule, say r = diameter/ 2 = (3.5/2) mm = 1.75mm

Volume of spherical capsule = 4/3 πr3

Volume of spherical capsule = (4/3)×(22/7)×(1.75)3 = 22.458

Answer: The volume of the spherical capsule is 22.46 mm3.

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Explanation:

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