A student travels from St. Louis to Indianapolis, a distance of 210 mi, in 6.0 h. The return trip over the same route takes 7.0 h. What is the average speed for
a. the first half of the trip?
b. the second half of the trip?
c. the total trip?
a. 35 mi/h
b. 30 mi/h
c. 32 mi/h
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Phil leans over the edge of a cliff and throws a rock upward at 5 m/s. Neglecting air resistance, two seconds later the rock's speed is
A) zero. B) 5 m/s. C) 10 m/s. D) 15 m/s. E) none of the above
The symbol for the element that is the major component of steel is ______________
Fill in the blank(s) with correct word
A car and a large truck traveling at the same speed collide head-on and stick together. Which vehicle undergoes the larger change in the magnitude of its momentum?
1.the car 2.the truck 3.the change in the magnitude of momentum is the same for both 4.impossible to determine without more information
With respect to the earth, object 1 is moving at speed 0.80 c to the right. Object 2 is moving in the same direction at speed 0.80 c with respect to object 1. How fast is object 2 moving with respect to the earth?
A) 0.64 c B) 0.98 c C) 0.16 c D) 1.6 c E) 0.80 c