8. The position of an ebject in given by the parametric egeatiems-2P 4y-s-1) Cal

Question

8. The position of an ebject in given by the parametric egeatiems-2P 4y-s-1) Calculale the average vector velecity betwess and2 . A Heck of es kg start iding from ret on ath incline plase at an agle Cakculate the acceleraties ef the bleck 49m2 Noac of the above 10. A forse ef 25 N accelerated a 5kgmas and predeces an acceleration of 3. Find the feree of friction a 35N A SN 11. The weight is sapported in eqibrium as showsFind T a. 300 N h 240 N d 180 N e. 640 N W- 300 N 12. The force F keeps the block on top of the incline plane in equilibrium. Calculate the valee of the normal force acting on the block Assume the angle of the incline is 30 the mass of the Mock 4 kg and the Force F is parallel to the incline.

Explanation / Answer

8. x(2) = 2(2^2) + 4 = 8 + 4 = 12 m/s

y(2) = 6(2-1) = 6 m/s  

x(0) = 4

y(0) = -6  

average velocity = displacement / time interval

v = ((12-4)i + (6 - (-6))j) / 2

v = 4i + 6j

Ans(b)

9. along the incline,

F = ma

m g sin30 = m a

a= 4.9 m/s^2

Ans(C)

10. F - f = m a

25 - f = (5 x 3)

f = 10 N  

Ans(C)

11. in vertical,

T1 sin37 - 300 = 0

T1 = 500 N  

Ans(c)

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