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 = %3D

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 = %3D

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Description: 11. (1) A small 35g toy rocket is launched straight up from the ground at 108 km/h (a) Whatis the kinetic energy of the toy rocket? (b) Find the work done by gravity after it has risen150 m.(i) (a). The kinetic energy of the toy rocket is =(b). The

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)...

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1. Pete lifts a 500 Newton barbell to a height of 1.2 meters. (a) How much force must Pete apply to lift the barbell, assuming he is lifting with a constant speed? (assume he is past the initial acceleration of lifting the barbell) (b) How much work does Pete do in lifting the barbell to this height? [E-S-A]
Find the work done in joules by gravity as an object of the mass m-8 kg is raised up at constant speed from a height h,=33 m to a height h2363 m. A.-7200 B. -4800 C.-1200 D. -2400 E. None hp SHOT ON POCO X3 NFC
A 996 kg car is travelling at a velocity of 15.4 m/s. How much work must be done on the car by the brakes to stop the car. Include the correct sign. Neglect friction except in the braking system.
3. Suppose you have an object attached to a bizarre spring, initially located at x = 0, the equilibrium point of the force of the spring on the object is given by F₁ = kx, S where k is a spring constant. (a) You displace the object from x = 0 to ₁ > 0, holding the object steady at the beginning and end. What is the work done by the spring? What is the work done by you? (b) You let go of the spring and observe the object move from location. x₁ to x2. Is x2 less than or greater than ₁? (c) What is the kinetic energy of the object at x2? (d) Is this bizarre spring realistic? Explain.
i) A small 25g toy rocket is launched straight up from the ground at 144 km/h (a) What is the kinetic energy of the toy rocket? (b) Find the work done by gravity after it has risen 220 m. (i) (a). The kinetic energy of the toy rocket is = (b). The work done by gravity after it has risen 220 m is =
7. A student in a lab exerts a 25 N force to pull a block a distance of 48 cm. If a total of 11 J of work is done, the angle between the force and the displacement is a. 89° b. 66° d. 24° e. none of the above c. 61° 8. A 102-g sparrow flying at 12.3 m/s wishes to have equal kinetic and gravitational potential energies. The height that will accomplish this is a. 0.315 m b. 0.628 m d. 1.13 m e. 7.72 m c. 0.787 m 9. Earth's mass is 5.98 x 1024 kg. Calculate the value of g at a point 4.8 x 105 km from the centre of Earth. a. 9.8 × 102 N/kg b. 8.3 x 10' N/kg C. 1.7 × 103 N/kg d. 1.7 x 10³ N/kg e. 9.8 × 105 N/kg 10. A piece of paper becomes electrically charged when a charged rod of plastic is placed close to it. This is referred to as a. charging by a conductor b. charging by induction c. charging by an insulator A P d. charging by contact e. charging by electricity 20 cm Ꭰ T 20 cm 11. Four charged spheres, A, D, P, and T are arranged as shown below. Sphere A has a charge of +4.5 × 10*C,…
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6. One end of a light inextensible string is attached to a block. The string is used to pull the block along a horizontal surface with a speed of 2 m s−1. The string makes an angle of 20° with the horizontal and the tension in the string is 25 N. Find the work done by the tension in a period of 8 seconds.
20. A 1 kg block is placed on a rough (0.1) 37 incline. The block is released from rest. What is the work done in J by the normal force after the block slides down the incline a distance d=1 m? (a) -0.8 (b) 0.0 (c) 3.2 21. A 2 kg projectile is fired from ground level at an angle fo with a kinetic energy K-200 J. If the projectile has a kinetic energy K=140 J at its maximum height (hmar), what is the value of haz in m? (a) 3 (b) 4 (c) 5 (d) 5.2 (d) 6 (e) 6.0 111 (e) 7 d 37 A mar