Question

An airplane needs to reach a velocity of 226.0m/s in order to take off. On a 2000 m runway, what is the minimum acceleration necessary for the plane to take flight? 11.40 m/s^2 12.77 m/s^2 15.57 m/s^2 9.920 m/s^2 Given A = 3.0 icirc + 4.0 and B = 2.0 icirc + 2.0, find the magnitude of C = A + 2B. 24 13 16 19 11 How much heat must be added to 0.5 kg of water to change it from a solid at 0degreeC to a liquid at 0degreeC? The latent heat of fusion of water is 3.34 times 10^5 J/kg. 250,000 J 167.000 J 189,000 J 157,000 J A box is hanging from 2 ropes as shown in the figure. What are the magnitudes of the tension force of each rope acting on the box? T1 = 280 N; T2 = 196 N T1 = 277 N; T2 = 196 N T1 = 342 N; T2 = 280 N T1 = 98 N; T2 = 98 N The energy of a certain system is predicted to follow a formula with respect to time 't': "E(t) = 1/2 t^3 + t^2". How much power is used by this system after a period of 2.00 times10^2 seconds? 3.12 times 10^6 J 4.04 times 10^6 J 2.03 times 10^8 J 6.02 times 10^4 J If a ball is released from a window ledge, how fast will it be travelling when it reaches the ground, 52 m below? 0 m/s 52 m/s 32 m/s 26 m/s The force acting on a particle varies as shown in the graph. Find the work done by the force on the particle as it moves from x=0 m to x = 8.00 m. 21J 24 J 12 J l8J

Answer 1

Ans 12) T₁sin $\theta$ = mg,    T₁sin35^o = 20 x 9.8,     T₁ = 341.7,    T₁ = 342N

             T₂ = T₁cos $\theta$ ,     T₂ = 342 cos35^o,   T₂ = 280N