Suppose a car travels 102 km at a speed of 30.5 m/s, and uses 2.1 gal...
Suppose a car travels 102 km at a speed of 30.5 m/s, and uses 2.1 gal of gasoline in the process. Only 30% of the gasoline goes into useful work to keep the car moving at a constant speed. In this problem you may assume that 1 gallon of gasoline produces 1.2 × 108 J of energy.
(a) What is the force exerted, in newtons, to keep the car moving at constant speed?
(b) If the required force is directly proportional to the speed that the car travels at, how many gallons will be used to drive 102 km at a speed of 29 m/s?
Homework Answers
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Suppose a car travels 102 km at a speed of 30.5 m/s, and uses
2.1 gal...
2. Suppose a car travels 108 km at a speed of 20.0 m/s, and uses 2.20...
2. Suppose a car travels 108 km at a speed of 20.0 m/s, and uses
2.20 gallons of gasoline. Only 30% of the gasoline goes into useful
work by the force that keeps the car moving at constant speed
despite friction. (The energy content of gasoline is 1.3 ✕
108 J per gallon.)
(a) What is the force exerted to keep the car moving at constant
speed?
N
(b) If the required force is directly proportional to speed, how
many...
A car travels at a constant speed around a circular track whose radius is 3.37 km....
A car travels at a constant speed around a circular track whose radius is 3.37 km. The car goes once around the track in 226 s. What is the magnitude of the centripetal acceleration of the car? I get 1.88 m/s^2
A car travels at a constant speed around a circular track whose radius is 3.0 km....
A car travels at a constant speed around a circular track whose radius is 3.0 km. The car goes once around the track in 420 s. What is the magnitude of the centripetal acceleration of the car? x m/s .1184 Additional Materials Section 5.2
A car travels at a speed of 21 m/s around a curve of 27 m. m...
A car travels at a speed of 21 m/s around a curve of 27 m. m = 1500 kg (i) What is the net centripetal force needed to keep the car from skidding sideways? (ii) Were there no friction between the car’s tires and the road, what centripetal force would be provided just by banking the road at 29o? (iii) Now, suppose a friction force is also present and prevents the car from skidding. Calculate the magnitude of the normal...
A 1.1 kg block with a speed of 2.1 m/s travels down a frictionless table and...
A 1.1 kg block with a speed of 2.1 m/s travels down a frictionless table and hits a horizontal spring attached to a wall. The spring constant is 980 N/m. a. What is the maximum compression of the spring? b. What is the maximum elastic force exerted by the spring on the block? Please show all steps in the calculation.
A car travels at constant speed around a corner. The cars speed is 35 m/s and...
A car travels at constant speed around a corner. The cars speed is 35 m/s and the radius of the circle is 0.25 km. The coefficient of static friction between the tires and the road is 0.7. What is the frictional force needed for the car to make the turn? What is the maximum force the static friction can produce? Does the car stay on the road? The car is in motion so why is the static friction important?
A car travels at a constant speed around a circular track whose radius is 2.51 km....
A car travels at a constant speed around a circular track whose radius is 2.51 km. The car goes once around the track in 356 s. What is the magnitude of the centripetal acceleration of the car?
A car travels at a constant speed around a circular track whose radius is 2.65 km. The car goes once around the track i...
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1) A wave travels at the speed of light (c=3.00*108 m/s). If its wavelength is 3.890*102...
1) A wave travels at the speed of light (c=3.00*108 m/s). If its wavelength is 3.890*102 nm what is its frequency? 2)A wave travels at the speed of light (c=3.00*108 m/s). If its wavelength is 7.004*102 nm what is its frequency?
A 2500kg car travels at a constant speed of 20 m/s North for 10 seconds. what...
A 2500kg car travels at a constant speed of 20 m/s North for 10 seconds. what is the net force on the car?
2. Suppose a car travels 108 km at a speed of 20.0 m/s, and uses
2.20 gallons of gasoline. Only 30% of the gasoline goes into useful
work by the force that keeps the car moving at constant speed
despite friction. (The energy content of gasoline is 1.3 ✕
108 J per gallon.)
(a) What is the force exerted to keep the car moving at constant
speed?
N
(b) If the required force is directly proportional to speed, how
many...
A car travels at a constant speed around a circular track whose radius is 3.0 km. The car goes once around the track in 420 s. What is the magnitude of the centripetal acceleration of the car? x m/s .1184 Additional Materials Section 5.2
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