Numericals (Ans: 0.2 m) The moment of a force of 25 N about a fixed point O is 5 N m. Calculate the distance of the point O from the line of action of the force. 2. What force is required to turn a wheel of radius 1.5 m to produce a turning effect of the 3. The diagram below shows a see saw pivoted at the centre. A girl of 300 N sits 2 m away from the in it (Ans: 60 N) centre. 2 m 1.5 m 300 N TE i What is the turning effect produced? vü. If another girl sits 1.5 m away from the centre, what should the weight of the girl be to produce the same turning effect? (Ans: i. 600 N m; ii. 400 N). 4. What force is required to produce a pressure of 1000 Pa on an area of 250 cm?? (Ans: 25 N) 5. A girl of mass 50 kg is standing on pencil heels. The area of cross section of each heel is 1 cm' and an elephant of mass 5000 kg and total area of the feet is 1000 cm² is standing on the floor. Who will exert more pressure and what is the difference between the pressure exerted by the girl and the (Ans: Girl; 2 x 106 Pa) 6. Convert 1 mm of Hg into pascal. Take the density of Hg = 13.6 x 10 kg/m' and g = 9.8 m/s. (Ans: 133.28 Pa) 7. Petrol of density 0.80 g/cm' is poured in a vessel upto a level of 75 cm. Calculate the pressure exerted at the bottom of the vessel. Take g = 10 m/s2. J (Ans: 6000 Pa) 8. The atmospheric pressure exerted on the surface of the earth is 105 N/m². If the density of air is assumed to be uniform equal to 1.3 kg/m and g = 10 m/s, calculate the height of the atmosphere. Ans: 76923 m) elephant?
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Numericals (Ans: 0.2 m) The moment of a force of 25 N about a fixed point O is 5 N m. Calculate the distance of the point O from the line of action of the force. 2. What force is required to turn a wheel of radius 1.5 m to produce a turning effect of the 3. The diagram below shows a see saw pivoted at the centre. A girl of 300 N sits 2 m away from the in it (Ans: 60 N) centre. 2 m 1.5 m 300 N TE i What is the turning effect produced? vü. If another girl sits 1.5 m away from the centre, what should the weight of the girl be to produce the same turning effect? (Ans: i. 600 N m; ii. 400 N). 4. What force is required to produce a pressure of 1000 Pa on an area of 250 cm?? (Ans: 25 N) 5. A girl of mass 50 kg is standing on pencil heels. The area of cross section of each heel is 1 cm' and an elephant of mass 5000 kg and total area of the feet is 1000 cm² is standing on the floor. Who will exert more pressure and what is the difference between the pressure exerted by the girl and the (Ans: Girl; 2 x 106 Pa) 6. Convert 1 mm of Hg into pascal. Take the density of Hg = 13.6 x 10 kg/m' and g = 9.8 m/s. (Ans: 133.28 Pa) 7. Petrol of density 0.80 g/cm' is poured in a vessel upto a level of 75 cm. Calculate the pressure exerted at the bottom of the vessel. Take g = 10 m/s2. J (Ans: 6000 Pa) 8. The atmospheric pressure exerted on the surface of the earth is 105 N/m². If the density of air is assumed to be uniform equal to 1.3 kg/m and g = 10 m/s, calculate the height of the atmosphere. Ans: 76923 m) elephant?
Explanation:
ans. I dont know the ans .