The formula for range of a projectile which is projected with an initial speed u making angle with horizontal is given as,
R = u^{2} sin 2/g
Where g is the free fall acceleration. For maximum range or horizontal distance, = 45^{o} . So, considering the astronaut as a projectile, we have,
20 = 3^{2} sin 2*45^{o}/g => g = 9*sin 90^{o}/20
Thus, free fall acceleration, g = 9/20 = 0.45 m/s^{2}
Need Help? 29. -11 points SerPSE9 4.P.012.soln. My Notes Ask Your Teacher An astronaut on a...
An astronaut on a strange planet finds that she can jump a maximum horizontal distance of 16.0 m if her initial speed is 3.80 m/s. What is the free-fall acceleration on the planet? (Ignore air resistance.)
An astronaut on a strange planet finds that she can jump a maximum horizontal distance of 17.0 m if her initial speed is 3.80 m/s. What is the free-fall acceleration on the planet? (Ignore air resistance.) m/s
5. O-12 points SerPSE9 3.P.039 M My Notes Ask Your Teacher A man pushing a mop across a floor causes it to undergo two displacements. The first has a magnitude of 148 cm and makes an angle of 1300 with the positive x axis. The resultant displacement has a magnitude of 139 cm and is directed at an angle of 36.0° to the positive x axis. Find the magnitude and direction of the second displacement. magnitudem direction o (counterclockwise from...
14. -13 points SerPSE9 7 P042 W My Notes Ask Your Teacher A 250-N child is in a swing that is attached to a pair of ropes 2.20 m long. Find the gravitational potential energy of the child-Earth system relative to the child's lowest position at the following times. (a) when the ropes are horizontal (b) when the ropes make a 32.0° angle with the vertical (c) when the child is at the bottom of the circular arc Need Help?...
My Notes Ask Your Teacher SerPSE9 29.P.035.WI. -/2 points straight section of the wire is 0.750 m long and lies along the y axis within a uniform magnetic field, B = 1.50 k T. If the current is in the wire carries a steady current of 2.00 A negative y direction, what is the magnetic force on the section of wire? Magnitude N Direction --Select- Need Help? Read It Watch It
-/13 points SerCP10 4.P.036.WI. My Notes Ask Your Teacher An object with mass m, - 5.80 kg, rests on a frictionless horizontal table and is connected to a cable that passes over a pulley and is then fastened to a hanging object with mass m, - 12.0 kg, as shown in the figure. (a) Find the magnitude of the acceleration of each object. m/s m (b) Find the tension in the cable Need Help? Submit Assignment ave Assignment Progress
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5. 13 points SerPSE9 39.P.039. My Notes Ask Your Teacher (a) Calculate the classical momentum of a electron traveling at 0.996c, neglecting relativistic effects. kg m/s (b) Repeat the calculation while including relativistic effects. kg m/s (c) Does it make sense to neglect relativity at such speeds? O Yes O No Need Help? Read It
1/5 points | Previous Answers SerPSE9 2 P059. My Notes Ask Your speed of a bullet as it travels down the barrel of a r fle toward the opening is given by v -5.90 x 107 t 2 + 3 10 x 105 t, where s in meters per second and t is n seconds. The acceleration of the bullet just as it leaves the barrel is zero (a) Determine the acceleration and position of the bullet as a function...