1. Which of the following is not a unit of work or energy?
kilowatt-hour, Newton-meter, joule, foot-pound per second
2. If the resultant force on a body is zero, and no resistive forces act on the body, the speed of the object is constant. T/F
3. The kilowatt-hour is a unit of energy. T/F.
1. Which of the following is not a unit of work or energy? kilowatt-hour, Newton-meter, joule,...
Question 1: The average cost of power in the US is 12 cents per kilowatt hour (cents /kWhr). Remembering that a watt is just joules/s and that kinetic energy is -mv2 where m is the mass in kg and v is the speed in m/s, convert the cost to cents per Joule, and then determine how much it would cost per kg to get an object to increase its speed by 10 km/s.
12. The unit of the force of the body in SI is: A) kilogram per cubic meter B) kilogram C) Newton D) kilogram meter per second 13. The force that occurs during deformation of the body is directly proportional to the elongation of the body and directed toward the opposite external force: A) elasticity force B) force of gravity C) force of the reaction of the support D) force of friction 14. The force resisting the relative motion of solid...
Which of the following is the correct unit for Young's Modulus? 1- Newton (N) 2- Newton per meter (N/m) 3- Newton per square meter (N/m2) 4- It doesn't have unit
The unit for Force is N for Newton. Which is defined as an object's mass times its acceleration. The unit for distance is "M" for Meter. The unit for work is "J" for Joule. Use the W=FD equation to solve the following problems. Please show your work. 8. I carried my 50kg girlfriend 7m. How many joules of work did I do? 9. The delivery man had to carry a 50kg box 20m to its owner. How much did this...
e4) The acceleration due to gravity on the earth's surface is a =-980665k meters per second squared. For this problem, let's approximate this as a =-10k m/(sec2). This means that gravity acting on a 5 kg object exerts a force of F ma 50k N, where N, a Newton, is a unit of force equal to a kg·m/ (see) If I raise a 5 kg object up 7 meters, I must do 350 J of work, where J, a Joule,...
Matching A. Metric unit of force B. Unit of work in the metric system C. Metric unit of power D. Unit of work in English system E. Unit of pressure in metric system named after the scientist Torricelli F. Mass per unit volume G. The force that is dependent on the masses and distance between them H. A unit of angular measure I. The acceleration of and object traveling with a circular motion J. The displacement of an object as...
please explain problem 5
Unit 7. Work and Energy In Class Packet 5. Each of the diagrams below shows a displacement vector for an object. Draw and label a force Name: vector that will do work on the object with the sign indicated. a. b. C. A 0.2 kg plastic cart and a 20 kg lead cart both roll without friction on a horizontal surface. 6. Equal forces are used to push both carts forward a distance of 1 m,...
9. The SI unit of current is equivalent to (1 point) O a volt per meter O an ampere per second O an ohm per degree Celsius Oa coulomb per second 10. An electric current is set up in a conductor. Which equation describes the relationship among (1point) the electric field E, a charge q in that current, and force F that maintains the flow of charge? OF-q+E OF -GE
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Quiz#4 Name: 1). Energy is defined as an ability of doing work a) True b) False c) Can's say 2). 1 Jule of energy corresponds to the work done a) 1 Nm b) 3 Nm c) 5 Nm 3). According to physics, does the earth do any work on moon a) No c) Can't say b) Yes 4). When we drop an object from a maximum height, initial kinetic energy is zero a) True b) False c) Undetermined...
#8
2. Consider the force F shown in the drawing. This force acts on an object that can move along the F positive or negative x axis, or along the positive or negative y axis. The work done by this force is positive when the displacement of the object is along the axis: (a)-x, -y (b)-x, +y (c) +x, +y circular pat What enabl is above po by the tens energy gravitation axis or along the Section 6 and the...