1) the ramp is inclined at an angle of ? = 25 degrees. m1 has a mass of 3.7 kg a
ID: 2115727 • Letter: 1
Question
1) the ramp is inclined at an angle of ? = 25 degrees. m1 has a mass of 3.7 kg and m2 has a mass of 9.9 kg. The coefficient of kinetic friction between m1 and the surface of the ramp is 0.19. m1 is connected to m2 using an ideal pulley and an ideal string. Calculate the magnitude of the acceleration of m2. 2) a 770 kg car is traveling with a speed of 41 km/h over a round hilltop. The shape of the hilltop can be approximated as an arc of a circle with a radius of 127 m. Calculate the normal force acting on the car as it goes over the highest point on this hilltop. 2b) A 14.4 cm long tendon was found to stretch 3.79 mm by a force of 11.1 N. The tendon was approximately round with an average diameter of 8.49 mm. Calculate the Young's modulus of this tendon. answer in NM^2 pleaseExplanation / Answer
m2g-T=m2a
T-m1gsintheta-um1gcostheta=m1a
a=m2g-m1gsintheta-um1gcostheta/(m1+m2)
a = (9.9*9.8-3.7*9.8*sin(25*pi/180)-0.19*3.7*9.8*cos(25*pi/180))/(9.9+3.7)=5.547m/s2
2.)mg-N=mv^2/R
770*9.8-N=770*11.39^2/127
N = 6760N
3.)F = YAdl/L
11.1=Y*pi*(0.00849/2)^2*3.79/144
Y = 7.45*10^6 N/m2
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