Some physics help plz?
Seeing as we do not know the mass 'm' of the car in this question, we'll simply to refer to it as m - a mass in kg. -- F = ma - force is equal to mass x acceleration. Thus, to accelerate a car of mass m at 15m s-2, F = 15m So the required force is 15m Newtons. Now, Fr = mu.R also applies, where Fr is the frictional force, mu is the co-efficient of friction (that you're looking for!) and R is the normal reaction, which is essentially the force with which the ground is pushing back up on the car. R = mg (our mass 'm' x gravity 'g', which is 9.8 - we'll leave it as g for now). In order not to skid, F must equal Fr. Therefore: mu x mg = 15m mu = 15m/mg mu = 15/g mu = 15/9.81 mu = 1.53
More physics help!!!?
IM LOST IN MY PHYSICS CLASS AND I NEED HELP, PLEASE! 10. A 90 V battery does 2.7 J of work in transferring some charge during a 2.0 second period. a. Calculate the amount of charge transferred. b. Calculate the current flow. c. Calculate the power. 11. An iron is rated at 1660 W and is connected to a 120 V outlet. a. Calculate the current that the iron draws b. Calculate the energy that is consumed by the iron in One-hour. 12. A 1.5-V dry cell is connected to a 4500Ω resistor. Calculate the current in this circuit. 13 A 60.0-W light bulb is connect to a 120V outlet. a. Calculate the current flowing through the bulb. b. What is the resistance of the bulb? Chapter 35 problems 14 A 6 Ω resistors, a 54Ω resistor and a 32-Q resistor are connected in series.. Calculate their total resistance. 15. Calculate the total resistance of four 8-Q resistors connected in parallel. 16. A 15Ω resistor, a 54Ω resistor, and a 39Ω resistor are connected in series across a potential difference of 120 V. a. Calculate the current flowing through the circuit. b. Calculate the voltage drop across the 15Ω resistor 17. Three resistors are connected in parallel across 20.0 V. The resistors draw a total of 5.0 A. Two of the resistors have values of 24Ω and 12Ω. What is the value of the third resistor? 18. Calculate the total resistance of the circuit shown below.
Some more physics help?
well, you have to add about 1 cal/gram per degree to raise to 100 degree C. Then 540 cal/gram to vaporize. Ergo. 2830 gm x 50 degrees x 1 cal/gm/degree + (2830 gm x 540 cal/gm) you can do the math
I need some physics help please.?
First we need to find the spring constant, k, from the period of oscillation: T = 2π √(m/k) or k = 4π² m/T² = 4π² 55/(2.6)² = 321.2 N/m Now, we can find the displacement under load: x = F/k = 55*9.8/321.2 = 1.68 m
Help on some more physics questions?
You pull your dog on a sled through the snow. You pull up on the rope at an angle of 27degrees from the horizontal and exert a constant force of 75N. The sled and the dog only move horizontally, a distance of 950 meters. What work do you do on the sled and the dog?
Just need some physics help?
F = G m1m2/R^2 m^2 = FR^2/G m^2 = 5.42x10^ -71/ 6.67 x 10^-11 m^2 = 81.2593703 x 10^-62 m = 9.01 x 10^-31 kg
What are some helpful resources for AP Physics 1?
AP Physics 1 Essentials is an easy-to-read guide to the entire AP Physics 1 course, featuring more than 600 worked-out problems with full solutions and deeper understanding questions.AP Physics 1 Essentials: An APlusPhysics GuideAP Physics 1 Essentials covers all major topics included in the AP Physics 1 course, including:kinematics,dynamics,momentum,impulse,gravity,uniform circular motion,rotation,work,energy,power,mechanical waves,sound,electrostatics,circuits.AP Physics 1 Essentials is integrated with the High School Physics and AP Physics Online website, which includes online question and answer forums, videos, animations, and supplemental problems to help you master the essential concepts of physics.This book is designed to assist physics students in their high school AP Physics courses both as a guide throughout the course as well as a review book to assist in end-of-course exam preparation.Its focus is on providing the bare bones, essential concepts necessary for success in the course in a straightforward and easy-to-read manner, leaving development of in-depth problem solving and lab work to the classroom, where it is most effective.In short, this is not intended as a substitute for a standard textbook or course, but rather as an invaluable supplementary resource.This new 2nd edition includes more than 90 AP-style problems to test your understanding and help prepare you for the AP Physics 1 Exam.Additional supplemental problems are available on the APlusPhysics website.