7. A 1300 kg car drives up a 17 m high hill (the elevation of the hill is 17 meters). During the drive two nonconservative forces do work on the car: the force of friction and the force generated by the car’s engine. The work done by friction adds 331 kJ to the internal energy. The work done by the engine is 634 kJ. (a) What is the change in the car’s kinetic energy? (b) If the car started up...
Question 3 A 5 kg block is at the top of a 10 m high hill. As the block slides down the mill, it runs into a spring of spring constant 200 N/m. How far will the spring compress
A runner is training for a race by running up a hill. The 80kg racer runs a 40m path to reach a height of 5m above where they started (see diagram below). Their legs put in a consistent force of 320N for the entire distance a) How much potential energy did the runner gain? (2 marks) b) How much energy was put into the system (2 marks) c) If the run took 14 seconds, what is the power rating of...
A runner is training for a race by running up a hill. The 85kg racer runs a 40m path to reach a height of 5m above where they started (see diagram below). Their legs put in a consistent force of 320N for the entire distance a) How much potential energy did the runner gain? (2 marks) b) How much energy was put into the system (2 marks) c) If the run took 15 seconds, what is the power rating of...
1. A 75kg athlete runs up a hill that is 55.Om high. How much work is required? If the activity required 26 seconds, what was their average power output?
You push a box of mass 16.3 kg with your car up to an icy hill slope of irregular shape to a height 4.5 m. The box has a speed 12.3 m/s when it starts up the hill, the same time that you brake. It then rises up to the top (with no friction) before immediately falling off a sheer cliff to the ground (with no drag). (a) What is the speed of the box at the top of the...
You push a box of mass 22.6 kg with your car up to an icy hill slope of irregular shape to a height 4.3 m. The box has a speed 12 m/s when it starts up the hill, the same time that you brake. It then rises up to the top (with no friction) to a flat area before coming to a rest when hitting a box of mass 89 kg. The heavier box then falls off a sheer cliff...
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.
a skier of mass 80 kg starts at the top of a 20m frictionless hill. after reaching the bottom he reaches a patch of snow 10m long with us =0.4.how fast is he going after he leaves the rough patch?
A car of mass 1100 kg starts from rest at sea level and climbs a hill of height 50.0 m. At the top of the hill, the car has a speed of 25.0 m/s, and at this instant, the driver shuts off the engine of the car. The car then coasts down the other side of the hill to height of 15.0 m above sea level. Assume that friction and air resistance are negligibly small. a) (6 pts) How much...