A force of 500 N acts horizontally on a 10,000 g body. What is its horizontal ac

Question

A force of 500 N acts horizontally on a 10,000 g body. What is its horizontal acceleration in m/s^2? If the object is accelerating at the rate of 2m/s^2 when acted by a net force of 10 N. Determine it's mass in kg. An object of 2 kg has an acceleration of 150 cm/s^2 Calculate the resultant force acting on it in N. An object has a mass of 20 kg. How much will it weigh on the earth surface in N? An object of mass 5 kg is moving in a circle. The radius of the circle is 1.25 m. If the object makes 10 complete revolutions every minute, find (a) the radial acceleration in m/s^2 and (b) the net force exerted on it by the radius in N.

Explanation / Answer

a) a = F/m => a = 500 N / 10 kg = 50 m/s2

b) m = F/a => m = 10 N / 2 ms-2 = 5 kg

c) F = ma => F = 2 kg * 1.5 m/s2 = 3 N

d) W = mg = 20 * 9.8 = 196 N

e) 1) aradial = v2/r = { (10*(2*pi*r)) / 60 }2 / r = 100 * 4 * 3.142 * r2 / 3600 * r = 1.0955 * r

= 1.0955 * 1.25 = 1.3694 ms-2

   2) F = maradial = 5 * 1.3694 = 6.847 N

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