A 1900 kg car is initially traveling 20 m/s. The driver presses down on the accelerator pedal and the engine does 1.00 MJ of work on the car, causing it to speed up. (a) What was the initial kinetic energy of the car? (b) What was the final kinetic energy of the car? (c) Find the final speed of the car.

A 1900 kg car is initially traveling 20 m/s. The driver presses down on the accelerator pedal and the engine does 1.00 MJ of work on the car, causing it to speed up. (a) What was the initial kinetic energy of the car? (b) What was the final kinetic energy of the car? (c) Find the final speed of the car.

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

An object is dropped from a height of 50 m with zero initial velocity. Assuming 5% of the energy is lost to drag, what's the speed of the object when it hits the ground? A 19.4m/s (B) 9.8m/s © 47.5m/s (D 30.5 m/s
(a)By what factor does the kinetic energy of a car increase when its speed doubles? triples? (b) What happens to this kinetic energy in a car crash? (c) Determine the speed a car is travelling if its kinetic energy is double what it would be at a highway speed limit of 100 km/h. (d) Make up a cartoon to educate drivers about the relationships among speed, higher energy, and damage done in collisions.
In the pitching motion, a baseball pitcher exerted an average horizontal force of 80 N against the 0.15 kg baseball while moving it through a horizontal displacement of 2.2 m before he released it. How much work did the pitcher do to the baseball as a result of this force? If the baseball’s velocity at the start of the pitching action was zero, how fast was the ball moving at the instant of release?
Can the work done by Friction be zero? In a case where static friction exists, the object does not move and the change in kinetic energy is also zero? W = Fd = ?KE = 0? What did I do wrong?
A 50.2-g golf ball is driven from the tee with an initial speed of 58.0 m/s and rises to a height of 22.4 m. (a) Neglect air resistance and determine the kinetic energy of the ball at its highest point. (b) What is its speed when it is 7.23 m below its highest point? (a) Number (b) Number Units Units
A 700 kg dragster accelerates from rest to a final speed of 120 m/s in 400 m (about a quarter of a mile) and encounters an average frictional force of 1200 N. What is its average power output in watts and horsepower of the car engine?a) watts= b) horsepower=
Please see attached image for question. Thank you
A new car model claims that a certain 1600 kg car can accelerate from rest to a speed of 25m/s in a time of 10 sec. What average power must the motor produce to cause thisacceleration? Ignore friction losses. Please help me answer this asap. Thank you!
Estimate the kinetic energy (in GJ) of a 96,000 metric ton aircraft carrier moving at a speed of at 22 knots. You will need to look up the definition of a nautical mile to use in converting the unit for speed, where 1 knot equals 1 nautical mile per hour.
Rank the following bodies in order of their kinetic energy, from least to greatest along with reasons. (i) a 4.0-kg body moving at 10.0 m/s; (ii) a 2.0-kg body that initially was at rest and then had 60 J of work done on it; (iii) a 2.0-kg body that initially was moving at 8.0 m/s and then had 40 J of work done on it; (iv) a 4.0-kg body that initially was moving at 10 m/s and then did 80 J of work on another body.
Spring uWU? Consider the spring-mass system on a frictionless horizontal surface as shown. Initially, the block is at position where the spring is in a compressed state. The block moves to the left until it reaches the the position ₂ where the spring is in a more compressed state. Which of the following is TRUE about the work done by spring Wel and change in elastic potential energy AUel of the system? Direction of motion k www m x2 O Wel 0 O Wel > 0; AUel 0; AUel > 0 O Wel < 0; AUel < 0 X1 x = 0
11. (1) A small 35g toy rocket is launched straight up from the ground at 108 km/h (a) What is the kinetic energy of the toy rocket? (b) Find the work done by gravity after it has risen 150 m. (i) (a). The kinetic energy of the toy rocket is = (b). The work done by gravity after it has risen 150 m is =