7. A student in a lab exerts a 25 N force to pull a block a distance of 48 cm. If a total of 11 J of work is done, the angle between the force and the displacement is a. 89° d. 24° b. 66° e. none of the above c. 61° 8. A 102-g sparrow flying at 12.3 m/s wishes to have equal kinetic and gravitational potential energies. The height that will accomplish this is a. 0.315 m b. 0.628 m c. 0.787 m d. e. 1.13 m 7.72 m

College Physics
11th Edition
ISBN:9781305952300
Author:Raymond A. Serway, Chris Vuille
Publisher:Raymond A. Serway, Chris Vuille
Chapter5: Energy
Section: Chapter Questions
Problem 4CQ: (a) Can the kinetic energy of a system be negative? (b) Can the gravitational potential energy of a...
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7. A student in a lab exerts a 25 N force to pull a block a distance of 48 cm. If a total of 11 J of work is done,
the angle between the force and the displacement is
a. 89°
d. 24°
e.
b. 66°
c. 61°
8. A 102-g sparrow flying at 12.3 m/s wishes to have equal kinetic and gravitational potential energies. The
height that will accomplish this is
a. 0.315 m
b. 0.628 m
c.
0.787 m
none of the above
d.
e.
1.13 m
7.72 m
Transcribed Image Text:7. A student in a lab exerts a 25 N force to pull a block a distance of 48 cm. If a total of 11 J of work is done, the angle between the force and the displacement is a. 89° d. 24° e. b. 66° c. 61° 8. A 102-g sparrow flying at 12.3 m/s wishes to have equal kinetic and gravitational potential energies. The height that will accomplish this is a. 0.315 m b. 0.628 m c. 0.787 m none of the above d. e. 1.13 m 7.72 m
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