50869. A certain car's drive-train produces a force of 5300 N as it accelerates from 0to 60 mph in 10.0 seconds. If this acceleration covers a distance of 125 m,determine the power output of the car's engine.vaN₁ = 010. An engine moves a boat through the water at a constant speed of 15 m/s.The engine must develop a thrust of 6.0 KN to balance the force of drag fromthe water acting on the hull. Determine the power output of the engine.✓ 11. An elevator's electric hoist is rated at 8.00 KW and has an efficiency of 90.0%.The hoist lifts the elevator car, mass 1225 kg, a distance of 9.00 m. (a) Howmuch time is required? (b) How much electrical energy is used to performthis task?12. Suppose a person uses a mechanical jack to lift half the weight of a car with amass of 1200 kg. During each stroke of the jack handle, the person's hand ispushing for a distance of 40.0 cm but the car is lifted only 5.0 mm. (a)Assuming the jack is 100% efficient, how much force must the person exerton the handle as the car is lifted? (b) If the actual amount of force required onthe handle is 90.0 N, what is the actual efficiency of the jack?40cm=0.4m↓5mm = 0.005mAnswer:Amse tob. 140 m/sb. 288 kN11. a. 15 s12. a. 74 N1. a. 250 MJ2. a.-144 kJ3. 2700 N4. 26 mm035. a. 42 m/s (d)6. -1200 J7. a. Work is equal.b. Frank is more powerful.3. a. 5500 Jb. O Jc. -5500 Jd. Brutus does zero work if wts are dropped.9. 66 kW (89 hp)10. 90 kWb. 89 mb. 120 kJb. 82%0.005mbre16=0.4m600 11Wawg = AE / ₂Wa=AEFa 0.005 = 30Fasd = mg4de. 2200 Wartnielqxd

Applied force on the car (F)=5300 N Initial Speed (u)= 0 mph Final Speed (v)=60 mph Time interval…

9. A certain car's drive-train produces a force of 5300 N as it accelerates from 0 to 60 mph in 10.0 seconds. If this acceleration covers a distance of 125 m, determine the power output of the car's engine. (1000

9. A certain car's drive-train produces a force of 5300 N as it accelerates from 0 to 60 mph in 10.0 seconds. If this acceleration covers a distance of 125 m, determine the power output of the car's engine. (1000

College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter5: Energy

Section: Chapter Questions

Problem 46P: A child of mass m starts from rest and slides without friction from a height h along a curved...

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Question

5086
9. A certain car's drive-train produces a force of 5300 N as it accelerates from 0
to 60 mph in 10.0 seconds. If this acceleration covers a distance of 125 m,
determine the power output of the car's engine.
va
N₁ = 0
10. An engine moves a boat through the water at a constant speed of 15 m/s.
The engine must develop a thrust of 6.0 KN to balance the force of drag from
the water acting on the hull. Determine the power output of the engine.
✓ 11. An elevator's electric hoist is rated at 8.00 KW and has an efficiency of 90.0%.
The hoist lifts the elevator car, mass 1225 kg, a distance of 9.00 m. (a) How
much time is required? (b) How much electrical energy is used to perform
this task?
12. Suppose a person uses a mechanical jack to lift half the weight of a car with a
mass of 1200 kg. During each stroke of the jack handle, the person's hand is
pushing for a distance of 40.0 cm but the car is lifted only 5.0 mm. (a)
Assuming the jack is 100% efficient, how much force must the person exert
on the handle as the car is lifted? (b) If the actual amount of force required on
the handle is 90.0 N, what is the actual efficiency of the jack?
40cm=0.4m
↓
5mm = 0.005m
Answer:
Amse to
b. 140 m/s
b. 288 kN
11. a. 15 s
12. a. 74 N
1. a. 250 MJ
2. a.-144 kJ
3. 2700 N
4. 26 mm03
5. a. 42 m/s (d)
6. -1200 J
7. a. Work is equal.
b. Frank is more powerful.
3. a. 5500 J
b. O J
c. -5500 J
d. Brutus does zero work if wts are dropped.
9. 66 kW (89 hp)
10. 90 kW
b. 89 m
b. 120 kJ
b. 82%
0.005m
bre
16=0.4m
600 11
Wawg = AE / ₂
Wa=AE
Fa 0.005 = 30
Fasd = mg4d
e. 2200 W
art
nielqxd

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