1. Which answer choice below includes only scalar quantities? Distance, speed, time Acceleration, energy, displacement Velocity, displacement, force Force, time, velocity Displacement, time, acceleration

1. Which answer choice below includes only scalar quantities? Distance, speed, time Acceleration, energy, displacement Velocity, displacement, force Force, time, velocity Displacement, time, acceleration

Name: 1.Which answer choice below includes only scalar quantities?Distance,
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Description: 1.Which answer choice below includes only scalar quantities?Distance, speed, timeAcceleration, energy, displacementVelocity, displacement, forceForce, time, velocityDisplacement, time, acceleration

Inquiry into Physics

8th Edition

ISBN:9781337515863

Author:Ostdiek

Publisher:Ostdiek

Chapter3: Energy And Conservation Laws

Section: Chapter Questions

Problem 8C

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According to the National Academy of Sciences, the Earths surface temperature has risen about 1F since 1900. There is evidence that this climate change may be due to human activity. The organizers of World Jump Day argue that if the Earth were in a slightly larger orbit, we could avoid global warming and climate change. They propose that we move the Earth into this new orbit by jumping. The idea is to get people in a particular time zone to jump together. The hope is to have 600 million people jump in a 24-hour period. Lets see if it will work. Consider the Earth and its inhabitants to make up the system. a. Estimate the number of people in your time zone. Assume they all decide to jump at the same time; estimate the total mass of the jumpers. b. What is the net external force on the Earthjumpers system? c. Assume the jumpers use high-tech Flybar pogo sticks (Fig. P8.32), which allow them to jump 6 ft. What is the displacement of the Earth as a result of their jump? d. What happens to the Earth when the jumpers land?
In Section 2.4, we computed the force needed to accelerate a 1,000-kg car from 0 to 27 m/s in 10 s. Compute the force using the alternate form of Newton’s second law. The change in momentum is the car’s momentum when traveling 27 m/s minus its momentum when going 0 m/s.
A hare and a tortoise compete in a race over a straight course 1.00 km long. The tortoise crawls at a speed of 0.200 m/s toward the finish line. The hare runs at a speed of 8.00 m/s toward the Finish line for 0.800 km and then stops to tease the slow-moving tortoise as the tortoise eventually passes by. The hare waits for a while after the tortoise passes and then runs toward the finish line again at 8.00 m/s. Both the hare and the tortoise cross the finish line at the exact same instant. Assume both animals, when moving, move steadily at their respective speeds. (a) How far is the tortoise from the finish line when the hare resumes the racer (b) For how long in time was the hare stationary?
Which one of the following groups contains only vector quantities? 1.acceleration, force, distance, energy 2.force, momentum, displacement, velocity 3.volume,speed,energy,distance 4.area, volume, speed, weight
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1.Suppose you throw a rubber ball at an elephant that ischarging directly at you (not a good idea). When the ballbounces back toward you, is its speed greater than, less than, orequal to the speed with which you threw it? Explain and draws.
I am having trouble on a 2d Motion question. The question is as follows. "A ball starts from rest and accelerates at 0.525 m/s2 while moving down an inclined plane 8.25 m long. When it reaches the bottom, the ball rolls up another plane, where, after moving 14.15 m, it comes to rest." I have figured out that the ball takes 5.60612 seconds to roll down the first plane. I am having trouble finding the speed of the ball at the bottom of the first plane, the magnitude of the acceleration along the second plane, and the ball's speed 8.00 m along the second plane.
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