8. A ball is in free fall. Its acceleration is: a. downward during both ascent and descent b. downward during ascent and upward during descent C. upward during ascent and downward during descent d. upward during both ascent and descent 9. An astronaut on the moon releases a baseball and an apple. What did th astronaut observe? a. The baseball falls slower than the apple. b. The apple falls slower than the baseball. c. The baseball and the apple fall at the same d. The baseball and the apple remain suspended 10. A freely falling body has a constant acceleration of 9.8 m/s2. This mear that; a. the acceleration of the body increases by 9.8 m/s2 during each seconc b. the body falls 9.8 m during each second c. the body falls 9.8 during the first second only d. the speed of the body increases by 9.8 m/s during each second 11. Ball A is thrown horizontally while ball B is dropped from rest from th same height and at the same time. a. Bail A reaches the ground first. b. Ball B reaches the ground first. c. They reach the ground at the same time. d. They will strike the ground with the same speed.

8. A ball is in free fall. Its acceleration is: a. downward during both ascent and descent b. downward during ascent and upward during descent C. upward during ascent and downward during descent d. upward during both ascent and descent 9. An astronaut on the moon releases a baseball and an apple. What did th astronaut observe? a. The baseball falls slower than the apple. b. The apple falls slower than the baseball. c. The baseball and the apple fall at the same d. The baseball and the apple remain suspended 10. A freely falling body has a constant acceleration of 9.8 m/s2. This mear that; a. the acceleration of the body increases by 9.8 m/s2 during each seconc b. the body falls 9.8 m during each second c. the body falls 9.8 during the first second only d. the speed of the body increases by 9.8 m/s during each second 11. Ball A is thrown horizontally while ball B is dropped from rest from th same height and at the same time. a. Bail A reaches the ground first. b. Ball B reaches the ground first. c. They reach the ground at the same time. d. They will strike the ground with the same speed.

College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter1: Units, Trigonometry. And Vectors

Section: Chapter Questions

Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...

See similar textbooks

Similar questions

4. A ball is initially rolling 3m/s east along a table. It undergoes an acceleration of 0.4m/s² south for 2 seconds. What is the velocity of the ball after this acceleration? Write your answer as a tuple (vx, vy).
4. What is free fall? How is it different than movement in Y direction? different than movement in X direction? Give examples to support answers. How is it your
A rock is dropped from 20 feet above the surface of the Earth. Which of the following is true? a. It falls because of the combined effects of gravity and air pushing downward upone it. b. It falls because of a natural tendency for rocks to rest upon the Earth c. It speeds up as it falls because of a nearly constant force of gravity acting on it. d. It speeds up as it falls because of an increasing force of gravity acting upon it. e. It quickly reaches a maximum speed, then falls at a constant rate.
Given a block which is at rest on a perfectly flat smooth table. You push with your hand horizontally on the block with some force. If the mass of the block = 2.00 kg and the acceleration of the block = 5.00 m/s2 then what is the force on the block from your hand in SI units? A. 10.0 N B. 0.100 N C. 0.400 N D. 2.50 N E. zero
8. 45 kg skier slides down a 410 incline. What would be the magnitude of the skier's acceleration if friction is ignored? A. 2.5 m/s2 O B. 1.65 m/s2 C. 0.4 m/s2 O D. 6.4 m/s2 O E. 0.6 m/s2 O F. 5 m/s2 G. zero
The trap-jaw ant, found throughout tropical South America, catches its prey by very rapidly closing its mandibles around its victim. Shown is the speed of one of its mandible jaws versus time in microseconds. a. What is the maximum acceleration of the ant’s mandible? b. The mass of a trap-jaw ant’s mandible has been estimated to be about 1.3 x 10-7 kg. Estimate the maximum force exerted by one mandible.
Two marbles roll off a table top that is 2 meters high. The marbles roll off the table at the same time, but with different speeds. The red marble has a speed of 3 m/s, while the blue marble has a speed of 6 m/s. Which is true? A.The blue marble will strike the ground in less time than the red marble. B.The red marble will strike the ground in less time than the blue marble. C.It is impossible to determine the time the marbles will take to reach the ground unless their mass is known .D.The red and blue marbles will strike the ground at the same time.
5. Two 20kg carts are attached to opposite ends of a cable. Each cart is on a different side of an incline as shown. Neglect the mass and friction of the cable and pulley. a. What is the acceleration of the carts? b. If the carts start at rest, and they do not run out of cable or incline, how far will they have traveled in 5 seconds? m₁ = 20 kg/ 12° 9 m₂ = 20 kg 20°
An adventurous Bravestone must cross a river and starts running toward it. As he runs, he notices a rope hanging from a tree limb. He grabs the rope and swings. Which of the following statement is true as Bravestone reaches the lowest point of the swing? a. the tension in the rope is equal to his mass times his acceleration. b. the tension in the rope is greater than his weight. c. his acceleration is downward at . d. the tension in the rope is equal to his weight.
Priya throws a 2-kg rock from a height of 26 m, straight up at 15 m/s. a. How fast will the rock be traveling 3.0 s later? b. What is the maximum height above the ground the rock will reach? c. How fast will the rock be travelling when it hits the ground? d. What would be the maximum height of a 4-kg rock, if thrown in the same manner.
1.
a. An object that is free-falling is acted upon by the force of gravity alone. b. A falling skydiver which has reached terminal velocity is considered to be in a state offree fall. c. A ball is thrown upwards and is rising towards its peak. As it rises upwards, it is NOT considered to be in a state offree fall d. An object in free fall experiences an acceleration which is independent of the mass of the object. e. A ball is thrown upwards, rises to its peak and eventually falls back to the original height. As the ball rises, its acceleration is upwards; as it falls, its acceleration is downwards. f. A ball is thrown upwards, rises to its peak and eventually falls back to the original height. The speed at which it is launched equals the speed at which it lands. (Assume negligible air resistance.) g. A very massive object will free fall at the same rate of acceleration as a less massive object.