To determine the location of the center of mass of a car, the car is driven over a scale. When the front wheels are over the scale, the weight recorded by the scale is 5800 N, and when the rear wheels are over the scale, the scale reads 6500 N
The distance between the front and rear wheels is 3.20 m. How far behind the front wheels is the center of mass located? A) 0.845 m
B) 1.50 m
C) 1.59 m
D) 1.69 m
E) 1.72 m
D
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How do typical wind speeds in Jupiter's atmosphere compare to typical wind speeds on Earth?
A) They are about the same as average winds on Earth. B) They are slightly faster than average winds on Earth. C) They are slightly slower than average winds on Earth. D) They are much faster than hurricane winds on Earth.
An electron moves with a speed of 8.0 × 106 m/s along the +x axis. It enters a region where there is a magnetic field of 2.5 T, directed at an angle of 60° to the +x axis and lying in the xy plane
(a) Calculate the magnitude of the magnetic force on the electron. (b) Calculate the magnitude of the acceleration of the electron.
The length of a 100-meter long spaceship passing by you at 0.87c is seen to be
A) 50 m. B) 87 m. C) 100 m. D) 125 m. E) 150 m.
A cable is 100-m long and has a cross-sectional area of 1.0 mm2. A 1000-N force is applied to stretch the cable. Young's modulus for the cable is 1.0 × 1011 N/m2. How far does the cable stretch?
A) 0.10 m B) 1.0 m C) 10 m D) 0.010 m