What is the magnitude of the net force acting a kite skilfully held stationary in the air? a) Zero b) Infinity c) Constant d) Cannot be predicted
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A: Given:-
What is the magnitude of the net force acting a kite skilfully held stationary in the air?
a) Zero
b) Infinity
c) Constant
d) Cannot be predicted
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- The answer is D) C.Statics 1 IYGBX A helium balloon floats at the end of a string. The net lift force (the buoyancy force minus the weight) on the balloon is 33_N. If the tension in the string exceeds 50 N of force, the string will break. How great a force can a horizontal wind exert on the balloon before the string breaks? Flift Fwind 24. Fwind ABC 1--1 44.69 N 39.32_N 41.29_N Tstring D. 46.76_N 42.63_N 37.56 N DEE E. F.A bowling ball of mass m=2.6 kg drops from a height h = 12 m. A semi-circular tube of radius r = 5.4 m rest centered on a scale. A) Write an expression for the reading of the scale when the bowling ball is at its lowest point, in terms of the variable in the problem statement B) What does the scale read in newtons.
- 2. An incline of the dimensions shown rests on the ground. Two boxes of equal mass are attached by a rope of negligible mass strung around a pulley at the top of the incline. The coefficient of static friction for 5 m the box on the incline is 0.6 and the coefficient of kinetic friction for the box on the incline is 0.5 10 m A) If it starts from rest at the top of the incline, how long does it take the box hanging in the air to reach the ground? B) What velocity does it have halfway to the bottom?5) A box with mass m=1.25 kg rests on the top of a bar. The coefficient of static friction between the box and the bar is μs=0.73 and the coefficient of kinetic friction is μk=0.39. a) Write an expression for Fm the minimum force required to produce movement of the box on the top of the bar. b) Solve numerically for the magnitude of the force Fm in Newtons. c) Write an expression for a, the box's acceleration, after it begins moving. (Assume the minimum force, Fm, continues to be applied.) d) Solve numerically for the acceleration, a in m/s².no air resistance, g=9.81 mls^2 mB=2450 goes up ramp, and the coefficient of kinetic friction between mass b and the ramp is 0.6. The ramp makes an angle of 63 degrees a counterweight is used to raise stone B by tying it to a second mass MA. The coefficient of friction for mA as it slides down the shaft is 0.4 pitched at an angle of 13 degrees. question- draw a body diagram for mass B and write 2 equations for the forces in x and y direction.
- you need to push the couch 4 m to the other side of the room. After the initial push to get it going you push on the 90 Kg couch with a steady horizontal force of 600 N. The coefficient of kinetic friction between the couch and the floor is 0.6. 1) what is the magnitude and direction of the fictional force on the couch? 2) what is the magnitude and direction of the net force on the couch? 3) what is the magnitude and direction of the acceleration of the couch?Q12Rock Climber Sliding Down a Smooth Slab 9.6 m Hk =0.72 %3D 56° Consider the rock climber climbing on a smooth slab, as shown above: the coefficient of kinetic friction between the climber's rock shoes and the rock is 0.72 the belayer cannot see the climber who is out of sight beyond the edge of the slab the belayer cannot hear the climber because the wind is blowing very hard The climber loses his footing and slides down the slab from rest. How long after the climber loses his footing does the belayer realize she needs to catch the climber's fall? [answer: about 2.1 s] FNET = ma W = mg g = 9.81 m/s? Ax = vot + ½ at?
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