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2. Since astronauts in orbit are apparently weightless, a clever method of measuring their masses is needed to monitor their mass gains or losses to adjust diets. One way to do this is to exert a known force on an astronauts and measure the acceleration produced. Suppose a net external force of 50.0 N is exerted and the astronaut's acceleration measured to be 0.893 m/s, (a) calculate her mass with solution. (b) by exerting a force on the astronaut, the vehicle in which they orbit experiences an equal and opposite force. Discuss how this would affect the measurement of the astronaut's acceleration. Proposed a method in which recoil of the vehicle is avoided. Write your answers to the space provided below.
X,y,z are three points on a straight road. A car passes X with a speed of 5m/s and travels from X to y with a constant acceleration of 2m/s²
Two discs are rotating about an axis as shown in the figure. The moment of inertia
of the right disc is 2 kg m2 and it rotates with angular speed of 2000 rpm. The
moment of inertia of the left disc is 5 kg m2 and it rotates in the opposite direction
with angular speed of 100 rpm. The discs are suddenly clamped together.
Determine the final common angular speed of the clamped discs.
What is the acceleration of a ball with a mass of 0.40 kg is hit with a force of 16N
An artist wishes to construct a moon-and-star mobile. If the star on the lower left has a mass of 200 grams, what are the masses of the other stars and moon
an airplane is flying in calm air 80 m/s bearing 40 degrees when it suddenly encounters a 20 m/s wind bearing 140. Determine the resultant velocity of the airplane.
On a normal day in the summer you can drive your 1050 kg car at a constant speed around
a corner whose radius of curvature is 12m without problems. The engineering staff at
CalTrans have determined that the maximum frictional force between your tires and the
road is 8100N under these circumstances.
A few days later it rains and the frictional force is now 10% of what it was
when dry. What is the minimum radius of the corner you make when traveling at the
speed from part b now? (Assume that speed is 11.0 m/s if needed.)
