Work Honors
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Last updated over 1 year ago
10 questions
1
A 75.0-kg man is riding an escalator in a shopping mall. The escalator moves the man at a constant velocity from ground level to the floor above, a vertical height of 4.60 m. What is the work done on the man by the escalator?
A 75.0-kg man is riding an escalator in a shopping mall. The escalator moves the man at a constant velocity from ground level to the floor above, a vertical height of 4.60 m. What is the work done on the man by the escalator?
1
A 0.075-kg arrow is fired horizontally. The bowstring exerts a force on the arrow over a distance of 1.20 m. The arrow leaves the bow at 40 m/s. What average force does the bow apply to the arrow?
A 0.075-kg arrow is fired horizontally. The bowstring exerts a force on the arrow over a distance of 1.20 m. The arrow leaves the bow at 40 m/s. What average force does the bow apply to the arrow?
1
A 1500-kg car is driven off a 50-m cliff during a movie stunt. If it was going 20 m/s as it went off the cliff, how fast is it going as it hits the ground?
A 1500-kg car is driven off a 50-m cliff during a movie stunt. If it was going 20 m/s as it went off the cliff, how fast is it going as it hits the ground?
1
How fast must a 3000-kg elephant move to have the same kinetic energy as a 65.0-kg sprinter running at 10.0 m/s?
How fast must a 3000-kg elephant move to have the same kinetic energy as a 65.0-kg sprinter running at 10.0 m/s?
1
How high a hill can a car coast up (engine disengaged) if work done by friction is negligible and its initial speed is 110 km/h?
How high a hill can a car coast up (engine disengaged) if work done by friction is negligible and its initial speed is 110 km/h?
1
If, in actuality, a 750-kg car with an initial speed of 110 km/h is observed to coast up a hill to a height 22.0 m above its starting point, how much thermal energy was generated by friction?
If, in actuality, a 750-kg car with an initial speed of 110 km/h is observed to coast up a hill to a height 22.0 m above its starting point, how much thermal energy was generated by friction?
1
A person pulls a toboggan for a distance of 35.0 m along the snow with a rope directed 25.0° above the snow. The tension in the rope is 94.0 N. How much work is done on the toboggan by the tension force?
A person pulls a toboggan for a distance of 35.0 m along the snow with a rope directed 25.0° above the snow. The tension in the rope is 94.0 N. How much work is done on the toboggan by the tension force?
1
How much work is done if the same tension is directed parallel to the snow?
How much work is done if the same tension is directed parallel to the snow?
1
A projectile of mass 0.750 kg is shot straight up with an initial speed of 18.0 m/s. How high would it go if there were no air friction?
A projectile of mass 0.750 kg is shot straight up with an initial speed of 18.0 m/s. How high would it go if there were no air friction?
1
If the projectile rises to a maximum height of only 11.8 m, determine the magnitude of the average force due to air resistance.
If the projectile rises to a maximum height of only 11.8 m, determine the magnitude of the average force due to air resistance.