The average velocity of a car traveling with a constant acceleration during a certain time interval is equal to the mean of the velocities at the beginning and end of that time interval. True False Free-fall is the motion of an object subject only to the influence of gravity. True False M
In problem 16.3(a), A 60-lb uniform thin panel is placed in a truck with end A resting on a rough hoirzontal surface and end B supported by a smooth vertical surface. Knowing that the deceleration of the truck is 12 ft/s^2, determine the reactions at ends A is a. 70.03 lb b. 60.30 lb c. 90.70 lb d. 80.71 lb
See attached file for full problem description. Please explain the theory behind each correct answer for the following questions 1. A rock is dropped from a high tower and falls freely under the influence of gravity. Which one of the following statements is true concerning the rock as it falls? a) It will gain an equal am
The Moon is in orbit around the Earth. Is the moon pulled y the Earth's gravity: or is the Earth pulled by the Moon's gravity: or both. Explain.
The Moon is in orbit around the Earth. Is the moon pulled by the Earth's gravity; or, is the Earth pulled by the Moon's gravity; or, both. Explain.
A 75 kg man just before contact with the ground has a speed of 6.4 m/s. (a.) In a stiff-legged landing he comes to a halt in 2.0 ms. What is the average net force that acts on him during this time. (b.) When he bends his knees, he comes to a halt in 0.10 s. What is the average net force now? (c.) During the landing,
See attached file.
A 2-kg object is thrown upwards with an initial velocity of +20 m/s and travels in free-fall motion. a. Diagram the forces acting upon the ball after it leaves the hand of the thrower. As in all free-body diagrams, label every force according to type. b. Calculate the acceleration of the ball. c. Calculate the speed of the b
Physics: Energy conversions, mechanical energy, elastic vs inelastic, initial speed, torques, energy required, angular speed, doppler effect
A ball dropped to the floor rises to a height less than its original height. Discuss some of the energy conversions that take place in a system like this. When a mass is placed on top of a vertical spring, the spring compresses and the mass moves downward. Discuss this system in terms of mechanical energy. Your car rolls
The gauge pressure at the bottom of a reservoir is four times what it is at a depth of 1.2 meters. How deep is the reservoir?
A liter of corn oil has a mass of 0.925 kg. What is the density and the specific gravity of the oil?
A carpenter drops a hammer off the roof of a house. If the hammer falls a distance of 6.46 meters, what is the speed just before striking the ground? Neglect air friction. I believe the answer is 11.3 m/s. I need to see each step and formula to solve this question.
Astronauts visiting Planet X have a 2.40 m-long string whose mass is 5.50 g. They tie the string to a support, stretch it horizontally over a pulley 1.60 m away, and hang a 1.80 kg mass on the free end. Then the astronauts begin to excite standing waves on the string. Their data show that standing waves exist at frequencies of 6
A 2000 kg ore car rolls 50.0 m down a frictionless 10.0 degree incline. If there is a horizontal spring at the end of the incline, what spring constant is required to stop the ore car in a distance of 1.00m?
I need some help with circular motion physics questions: 1. Young David who slew Goliath experimented with slings before tackling the giant. He found that with a sling of length .598 m, he could develop a rotation rate of 8.04 rev/s in his weapon. If he increased the length to .892 m, he could revolve the sling only 5.99 time
What is the free fall acceleration in a location where the period of a 2.15 m long pendulum is 2.94s? Answer in units of m/s2. The answer must be written within + or - 0.14%
1) A tennis ball is thrown vertically downward from a height of 54 feet with an initial velocity of 8 feet/second. What is its impact if it hits a six foot tall man on the head?(a(t)=-32) 2) A projectile is shot vertically upward from ground level with an initial velocity of 49 meters per second. Use a(t)=-9.8 m/sec^2 A)
A stone is dropped from the top of a cliff. The splash it makes when striking the water below is heard 3.33 s later. How high is the cliff?
If m1 = 3.12 kg, m2 = 2.74 kg, and m3 = 2.5 kg, to the nearest hundredth of a nJ what is the potential energy of the configuration? (See attached file for full problem description)
Rotating Space Stations. One problem for human living in outer space is that they are apparently weightless. One way around this problem is to design a space station that spins about its center at a constant rate. This creates "artificial gravity" at the outside of the station. A) If the diameter of the space station is 8
Three objects are positioned along the x axis as follows: 4.4 kg at x = +1.1m, 3.7 kg at x = -0.80m, and 2.9 kg at x = -1.6 m. The acceleration due to gravity is the same everywhere. What is the distance from location of the center of gravity to the location of the center of mass for this system A ceiling fan has five blades
BLOCK WITH A FORCE THERE IS A BLOCK OF SIDE X METRES RESTING ON A FRICTIONLESS SURFACE A FORCE F IS APPLIED AT THE LEFT TOP OF THE BOX(TAKE THE DIRECTION OF FORCE IS FROM LEFT TO RIGHT) HORIZONTALLY NOTE: THE FORCE IS NOT AT THE CENTRE OF GRAVITY. PROVE THAT THE BOX TENDS TO ROTATE ABOUT THE CENTRE OF GRA
When scientists are trying to understand a particular set of phenomena, they often make use of, in a scientific sense, a kind of analogy or mental image of the phenomena in terms of something we are familiar with called: (a) model (b) theory (c) law (d) principle Usually a model is relatively simple and provides a stru
Q1) Block A of mass m1 on a smooth frictionless surface being pulled to the right by the force of gravity on block B with mass m2 by means of the attached string (as shown in the attached image). Assume no friction anywhere in the system. Assuming all units are mks, the force exerted by the gravity that is effective in moving b
1. Galileo dropped objects from the Tower of Pisa to study gravity. The objects height above the ground could be measured using h=-4.9t^2 +56. a) How high is the Tower? 56 units b) How far has an object fallen after 2 seconds? h = -4.9^2 + 56 h = -4.9(2)^2 +56 h = -19.6 +56 h= 36.4 units c) How long will it take
A rectangular door is submerged at a depth of 3 meters in water. How much force is exerted by pressure against the door?
A rectangular door with dimensions 5 m by 9.1 m is submerged at a depth of 3 meters in water. How much force is exerted by pressure against the door?
A simple pendulum of length 2.5 m makes 5.0 complete swings in 16 s. What is the acceleration of gravity at the location of the pendulum?
Assume that the acceleration of gravity is 10 m/s2 downward, and that all friction effects can be neglected. A ball is thrown upward at a velocity of 20 m/s. What is its velocity at t = 2 s? zero a. 10 m/s upward b. 10 m/s downward c. 20 m/s d
What is the radius of the skull if the skull has dimensions 200*200*200, and where will its centre of gravity be?
GM/r2 If my planet is 6052 km and my planets mass is 4.87e24 kg how do I calculate the gavitational acceleration of the planet?
Can anyone please show me how to get started on the attached lab questions? Thanks! Part 2 (also attached) Equipment: A length of string, a compact object which can be tied to the string like a metal washer, a tack, a stopwatch or clock, and a meter or yard stick. Procedure: I. Tie your object to the string and ti