Homework Answers
A car of mass 1510 kg traveling at 22 m/s is at the foot of a...
A car of mass 1510 kg traveling at 22 m/s is at the foot of a hill that rises 115 m in 2.2 km. At the top of the hill, the speed of the car is 12 m/s. Find the average power delivered by the car's engine, neglecting any frictional losses. (In watts)
A car of mass 1570 kg traveling at 24.0 m/s is at the foot of a...
A car of mass 1570 kg traveling at 24.0 m/s is at the foot of a hill that rises 100 m in 2.20 km. At the top of the hill, the speed of the car is 8.0 m/s. Find the average power delivered by the car's engine, neglecting any frictional losses.
Work and Power
A car of mass 1600 kg traveling at 20 m/s is at the foot of a hill that rises 110 m in 3.4 km. At the top of the hill, the speed of the car is 14 m/s. Find the averagepower delivered by the car's engine, neglecting any frictional losses.Answer in watts
A car of mass M = 1500 kg traveling at 55.0 km/hour enters a level turn...
A car of mass M = 1500 kg traveling at 55.0 km/hour enters a level turn (θ=0), and there is a coefficient of static friction μ between the road and the car's tires. What is μmin, the minimum value of the coefficient of static friction between the tires and the road required to prevent the car from slipping? Assume that the car's speed is still 55.0 km/hour and that the radius of the curve is 65.4 m .
The driver of a 1550 kg car, initially traveling at 12.1 m/s, applies the brakes, bringing...
The driver of a 1550 kg car, initially traveling at 12.1 m/s, applies the brakes, bringing the car to rest in a distance of 18.5 m. (a) Find the net work done on the car. (b) Find the magnitude and direction of the force that does this work. (Assume this force is constant.)
A 1100 kg car traveling at 20 m/s goes over a hill. At the top, the...
A 1100 kg car traveling at 20 m/s goes over a hill. At the top, the hill provides an upward normal force of 5600 N. (a) Assuming the hill has a circular profile, find the radius of curvature of the hill. (b) What is the maximum speed the car can go over the hill without ramping the car off the ground?
A car of mass M = 800 kg traveling at 55.0 km/hour enters a banked turn...
A car of mass M = 800 kg traveling at 55.0 km/hour enters a
banked turn covered with ice. The road is banked at an angle ?, and
there is no friction between the road and the car's tires as shown
in(Figure 1) . Use g = 9.80 m/s2 throughout this problem.
Now, suppose that the curve is level (?=0) and that the ice has
melted, so that there is a coefficient of static friction ? between
the road and...
A car of mass M = 1300 kg traveling at 65.0 km/hour enters a banked turn...
A car of mass M = 1300 kg traveling at 65.0 km/hour enters a banked turn covered with ice. The road is banked at an angle θ, and there is no friction between the road and the car's tires as shown in (Figure 1) . Use g = 9.80 m/s2 throughout this problem. r= 91.43 m. Now, suppose that the curve is level (θ=0) and that the ice has melted, so that there is a coefficient of static friction μ...
A railroad car (car-A) of mass 3.5X105 kg is traveling at a speed of 0.46 m/s...
A railroad car (car-A) of mass 3.5X105 kg is traveling at a speed of 0.46 m/s and strikes another car (car-B) of mass 8.9X104 kg, which is moving towards car-A with speed 0.25 m/s. If these cars lock together as a result of the collision, what is the common speed (in m/s) after the collision? (a) Before collision (b) After collision 0.2023 1.56 0.316 0.017
A 1300 kg sports car accelerates from rest to 70 km/h in 7.4 s. What is...
A 1300 kg sports car accelerates from rest to 70 km/h in 7.4 s. What is the average power in Watts delivered by the engine?
A car of mass M = 800 kg traveling at 55.0 km/hour enters a
banked turn covered with ice. The road is banked at an angle ?, and
there is no friction between the road and the car's tires as shown
in(Figure 1) . Use g = 9.80 m/s2 throughout this problem.
Now, suppose that the curve is level (?=0) and that the ice has
melted, so that there is a coefficient of static friction ? between
the road and...
A railroad car (car-A) of mass 3.5X105 kg is traveling at a speed of 0.46 m/s and strikes another car (car-B) of mass 8.9X104 kg, which is moving towards car-A with speed 0.25 m/s. If these cars lock together as a result of the collision, what is the common speed (in m/s) after the collision? (a) Before collision (b) After collision 0.2023 1.56 0.316 0.017
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