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L=200m 1250 Problem 1: A car having a mass of 1200 kg accelerates from 30 to...
An automobile has a mass of 1200 kg. What is its kinetic energy, in kJ, relative...
An automobile has a mass of 1200 kg. What is its kinetic energy, in kJ, relative to the road when traveling at a velocity of 50 km/h? If the vehicle accelerates to 100 km/h in 15 seconds, what is the change in power required?
A 1250 kg car drives up a hill that is 16.2 m high. During the drive,...
A 1250 kg car drives up a hill that is 16.2 m high. During the drive, two nonconservative forces do work on the car: (i) the force of friction, and (ii) the force generated by the car's engine. The work done by friction is -2.91 times 10^5 J; the work done by the engine is 6.64 times 10^5 J. Find the change in the car's kinetic energy from the bottom of the hill to the top of the hill.
3. An engine exerts a force of 10000 N on a 1000 kg car travelling over...
3. An engine exerts a force of 10000 N on a 1000 kg car travelling over a flat road. The force (overcoming friction) accelerates the car from rest such that it travels a distance of 50 m in 5 s Find e. the net acceleration of the car, f. normal force exerted by the road on the car, and g. the coefficient of kinetic friction between the car and the road? 4. A 10 kg block is initially at rest...
As the driver steps on the gas pedal, a car of mass 1 100 kg accelerates...
As the driver steps on the gas pedal, a car of mass 1 100 kg accelerates from rest. During the first few seconds of motion, the car's acceleration increases with time according to the expression below, where tis in seconds and a is in m/s2. a = 1.13 t - 0.210 t2 + 0.240 t3 (a) What is the change in kinetic energy of the car during the interval from t = 0 to t = 2.10 s? (b) What...
A 1500-kg car starts from rest and accelerates uniformly to 18.0 m/s in 12.0 s over...
A 1500-kg car starts from rest and accelerates uniformly to 18.0 m/s in 12.0 s over a dry concrete road. Assume that kinetic friction remains constant at 400 N during this time. – (a) Find the net work done on the car and the work done by the engine. – (b) How many revolutions does each tire make over the 12.0 s interval? What is the angular speed of the wheels when the car has traveled half the total distance?...
A 0 4 kg flywheel, I = 1/2mr^2, accelerates from rest to 1200 rev/min in 6.0...
A 0 4 kg flywheel, I = 1/2mr^2, accelerates from rest to 1200 rev/min in 6.0 seconds. If r = 0.4 m, find: a) its angular acceleration in rad/sec^2 b) its rotational kinetic energy at t = 6.0 sec.
12. In turning a corner, a car of mass 2 000 kg describes on a horizontal...
12. In turning a corner, a car of mass 2 000 kg describes on a horizontal plane a circle of radius 30 m at 14 m/s. Find the force of friction needed to produce this acceleration, and the least coefficient of friction needed between the tyres and the road. 13. In the preceding question find at what angle the track should be banked in order that there be no frictional force needed to produce the required acce- leration. 14. A...
answer all questions pleaseeee Problem# 5: A box with mass 12.0 kg moves on a ramp that is inclined at an ang...
answer all questions pleaseeee
Problem# 5: A box with mass 12.0 kg moves on a ramp that is inclined at an angle of 60.0 above the horizontal. The coefficient of kinetic friction between the box and the ramp surface is u-0.380, a) Draw a free body diagram b) Express all required equations c) Calculate the magnitude of the acceleration of the box if you push on the box with a constant force F- 150.0 N that is parallel to the...
1. A car accelerates from zero to 105 km/h in 5.21 s. What is its average...
1. A car accelerates from zero to 105 km/h in 5.21 s. What is its average acceleration in km/h/s and m/s? 2. An object moving in the x-direction has a position described by the function x(t) - 6.30t + 8.70t2, where t is in seconds and x is in meters. What is the acceleration as a function of time? The figure shows the graph of v vs t for the motion of a motorcyle that starts from rest and moves...
help with part 5 1. A 125-kg load is lifted 12.0 m vertically with an acceleration...
help with part 5
1. A 125-kg load is lifted 12.0 m vertically with an acceleration a -0.32g by a single cable. Determine: (a) the tension in the cable, (b) the net work done on the load, (c) the work done by the cable on the load, (d) the work done by gravity on the load, and (e) the final speed of the load assuming it started from rest. 2. A 1.60-m tall person lifts a 2.10-kg book from the...
A 1250 kg car drives up a hill that is 16.2 m high. During the drive, two nonconservative forces do work on the car: (i) the force of friction, and (ii) the force generated by the car's engine. The work done by friction is -2.91 times 10^5 J; the work done by the engine is 6.64 times 10^5 J. Find the change in the car's kinetic energy from the bottom of the hill to the top of the hill.
3. An engine exerts a force of 10000 N on a 1000 kg car travelling over a flat road. The force (overcoming friction) accelerates the car from rest such that it travels a distance of 50 m in 5 s Find e. the net acceleration of the car, f. normal force exerted by the road on the car, and g. the coefficient of kinetic friction between the car and the road? 4. A 10 kg block is initially at rest...
A 0 4 kg flywheel, I = 1/2mr^2, accelerates from rest to 1200 rev/min in 6.0 seconds. If r = 0.4 m, find: a) its angular acceleration in rad/sec^2 b) its rotational kinetic energy at t = 6.0 sec.
12. In turning a corner, a car of mass 2 000 kg describes on a horizontal plane a circle of radius 30 m at 14 m/s. Find the force of friction needed to produce this acceleration, and the least coefficient of friction needed between the tyres and the road. 13. In the preceding question find at what angle the track should be banked in order that there be no frictional force needed to produce the required acce- leration. 14. A...
answer all questions pleaseeee
Problem# 5: A box with mass 12.0 kg moves on a ramp that is inclined at an angle of 60.0 above the horizontal. The coefficient of kinetic friction between the box and the ramp surface is u-0.380, a) Draw a free body diagram b) Express all required equations c) Calculate the magnitude of the acceleration of the box if you push on the box with a constant force F- 150.0 N that is parallel to the...
1. A car accelerates from zero to 105 km/h in 5.21 s. What is its average acceleration in km/h/s and m/s? 2. An object moving in the x-direction has a position described by the function x(t) - 6.30t + 8.70t2, where t is in seconds and x is in meters. What is the acceleration as a function of time? The figure shows the graph of v vs t for the motion of a motorcyle that starts from rest and moves...
help with part 5
1. A 125-kg load is lifted 12.0 m vertically with an acceleration a -0.32g by a single cable. Determine: (a) the tension in the cable, (b) the net work done on the load, (c) the work done by the cable on the load, (d) the work done by gravity on the load, and (e) the final speed of the load assuming it started from rest. 2. A 1.60-m tall person lifts a 2.10-kg book from the...
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