Physics 1044 sec Quiz #5(Chap 5.1-56) Name 10/20/17(F) 1) An 10.0 g object attac
ID: 1785071 • Letter: P
Question
Physics 1044 sec Quiz #5(Chap 5.1-56) Name 10/20/17(F) 1) An 10.0 g object attached to the end of a string is execut The radius of the orbit is 1.50 m. Its speed is known to be 2.00 m/sec ing a circular motion in a horizontal plane a If the string will break if the tension in the string exceed 50.0 N, what is the maximam speed object can have? 2) An objiet is executing a circular motion of radius r-50 m. Its tangential speed is 10.0 m/s. The magnitude of the centripetal force is 040 N. a. Compute the period of the motion. b. What must be the mass of the object? 3) Compute the maximum speed of a car which can safely negotiate a curve (r-100 0 m) Assume the coefficient of static friction of the tires and the road is s-025. 4) A race track of radius 100.0 m is banked at an unknown angle. If a car is to negotiate the curve at 25.0 m/s, what should be the banking angle? 5) A hypothetical planet has a mass 5.00 times that of Earth. If its radius is the same as that of the Earth, what is the value of g near its surface? 6) Two objects (m] kg and m2 -3.0 kg) are separated by 5.0 m. The gravitational force betweem them is 1.60 x 10-11 N Use: G = 6.67 x 10-11 Nm,2 /kg2 a. Compute the mass miExplanation / Answer
1) m = 10 gm = 0.010 Kg
r = 1.50 m
v = 2 m/s
a) let the maximum speed is v
as Tension = m * v^2/r
50 = 0.010 * v^2/1.50
v = 86.6 m/s
the maximum speed of the object is 86.6 m/s