10. A toy car is on a small indoor track, which is 100-m in circumference. The car starts from rest, accelerates uniformly, and after 5 seconds reaches a point halfway around the circle. At this time, what is the magnitude of the car's acceleration? A) 4 m/s B) 9 m/s C) 16 m/s D) 25 m/s E) >25 m/s antel The block is released

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Chapter8: Potential Energy And Conservation Of Energy
Section: Chapter Questions
Problem 64P: A block of mass 500 g is attached to a spring of spring constant 80 N/m (see the following figure)....
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8. Jf 15 J of potential energy are stored in a spring which has been compressed by 2 cm from its relaxed length, how much
force will this spring exert if it is stretched by 4 cm from its relaxed length?
A) 500 N
B) 3000 N
C) 7500 N
D) 75,000 N
E) None of the Above
mass of 10 kg is attached to the spring in problem 8. The spring is compressed by 2 cm and is released. When the
spring reaches its equilibrium position, what is the speed of the 10-kg mass?
A) 1 m/s
B) 1.7 m/s
C) 2 m/s
D) 2.7 m/s
E) 3 m/s
3.S +1.S
10. A toy car is on a small indoor track, which is 100-m in circumference. The car starts from rest, accelerates uniformly,
and after 5 seconds reaches a point halfway around the circle. At this time, what is the magnitude of the car's
acceleration?
A) 4 m/s
B) 9 m/s
C) 16 m/s
D) 25 m/s
E) >25 m/s
11. A 2-kg block starts from rest at the top of a 10-m long ramp inclined at 45 deg to the horizontal. The block is released
and begins to slide down the ramp. At the bottom of the ramp the block has a speed of 9 m/s. What is the coefficient of
friction between the block and the ramp?
A) 0.12
B) 0.22
С) 0.32
D) 0.42
E) 0.52
12.25+ 2.2 5
14.5
4.
Transcribed Image Text:8. Jf 15 J of potential energy are stored in a spring which has been compressed by 2 cm from its relaxed length, how much force will this spring exert if it is stretched by 4 cm from its relaxed length? A) 500 N B) 3000 N C) 7500 N D) 75,000 N E) None of the Above mass of 10 kg is attached to the spring in problem 8. The spring is compressed by 2 cm and is released. When the spring reaches its equilibrium position, what is the speed of the 10-kg mass? A) 1 m/s B) 1.7 m/s C) 2 m/s D) 2.7 m/s E) 3 m/s 3.S +1.S 10. A toy car is on a small indoor track, which is 100-m in circumference. The car starts from rest, accelerates uniformly, and after 5 seconds reaches a point halfway around the circle. At this time, what is the magnitude of the car's acceleration? A) 4 m/s B) 9 m/s C) 16 m/s D) 25 m/s E) >25 m/s 11. A 2-kg block starts from rest at the top of a 10-m long ramp inclined at 45 deg to the horizontal. The block is released and begins to slide down the ramp. At the bottom of the ramp the block has a speed of 9 m/s. What is the coefficient of friction between the block and the ramp? A) 0.12 B) 0.22 С) 0.32 D) 0.42 E) 0.52 12.25+ 2.2 5 14.5 4.
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