On a Hertzsprung-Russell diagram, where would we find white dwarfs?
A) upper right
B) lower right
C) upper left
D) v left
D) v left
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A 46.0-kg crate, starting from rest, is pulled across a floor with a constant horizontal force of 225 N. For the first 11.0 m the floor is frictionless, and for the next 10.0 m the coefficient of friction is 0.20. What is the final speed of the crate after being pulled these 21.0 m?
What will be an ideal response?
An object moving along the x axis is acted upon by a force Fx that varies with position as shown. How much work is done by this force as the object moves from x = 2 m to x = 8 m?
?
?
A. ?10 J B. +10 J C. +30 J D. ?30 J E. +40 J
Parallel Wires: Two long parallel wires are 0.400 m apart and carry currents of 4.00 A and 6.00 A. What is the magnitude of the force per unit length that each wire exerts on the other wire? (?0 = 4? × 10-7 T ? m/A)
A. 2.00 ?N/m B. 5.00 ?N/m C. 12.0 ?N/m D. 16.0 ?N/m E. 38.0 ?N/m
A 1500 kg car accelerates from rest to 35 m/s in 6.5 s. If its engine and tires are able to provide a force to the car of 8500 N, what was the magnitude of the sum of forces due to friction and air resistance on the car during this interval?
A. 11450 N B. 1840 N C. 3510 N D. 3150 N