2. Two masses are connected by a string, and suspended over a pulley. If one mass is 4.5 kg, and the other massis 7.5 kg, what is the magnitude of the acceleration of the system?a. 6.1 m/s? b. 2.5 m/s²c. 3.7 m/s²d. 4.8 m/s?e. none of above

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Answered: Two masses are connected by a string,…

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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9. True or False questions. Circle the correct answer. a. An example of a Vector is Temperature. TRUE or FALSE b. In a vacuum, Heavier objects fall faster than lighter objects. TRUE or FALSE C. X values and Y values can be determined independently when performing calculations using Galileo's kinetic equations. TRUE or FALSE d. Static friction is a force that applied to object that is stationary. TRUE or FALSE e. When a spring is compressed, the spring is said to have potential energy. TRUE or FALSE f. A car crash is an example of an Impulse. TRUE or FALSE g. Centripetal force is not a new force. It is any combination of forces that cause an object to follow a path of circular motion. TRUE or FALSE h. Consider the following shapes: Cylinder, Hoop, Solid sphere, and spherical shell. The cylind has the greatest inertia. TRUE or FALSE
The Moon is 60 Earth radii (i.e. 60 rEarth) from the center of the Earth and has a mass of 0.012 Earth masses (i.e. 0.012 mEarth) a. How many Earth radii is the center of mass (the “barycenter”) of the Earth-Moon system from the center of the Earth? b. Is the center of mass inside the Earth or outside the Earth? c. What point along the line from the center of the Earth to the center of the Moon orbits the barycenter of the Solar System in a (nearly) circular orbit (e.g. the center of the Earth, the barycenter of the Earth-Moon system, the midpoint, the center of the Moon)?
What is the gravitational force that two 70 kg people exert on each other when standing 15 m apart? O A. 1.67x10-9 N O B. 2.22x10-11 N O C. 6.67x10-11 N O D. 2.50x10-8 N
7. A bowling ball and a feather are dropped from a height of 100 ft. The bowling ball weighs 12 Ibs and the feather weighs 3 ounces. a. What is the Force (in Newtons) of both objects? b. The value of g is varies depending on what planet you are on. Bigger planets have a larger value of g. The value of g on the moon is 1.62 m/s2. Calculate the forces of these objects falling on the moon.
A ball with 250 g mass and radius of 5.0 cm rests on a truck. Truck accelerates forward 1.50 m/s2. What it’s the acceleration of ball. With respect to truck and with respect to ground ?
4. The magnitude and direction of the velocities of two identical A frictionless balls before they strike each other are as shown. m m Assuming e = 0.8, determine the magnitude and direction of the velocity of each ball after the impact. 30 60° VA =9 m/s VB = 12 m/s
An astronaut has a weight of 500 N on the Earth. They then travel to a new planet which has twice the mass of the Earth and twice the radius of the Earth. The weight of the astronaut on this new planet would be a. 500 N b. 2000 N с. 250 N O d. 125 N O e. 1000 N
3. One newton is equivalent to: a) 1 kg · m/ s d) 1 kg / m b) 1 kg m/s? e) 1 kg m c) 1 kg - m² I s?
3. An m = 55 kg sprinter, when starting a race, pushes back horizontally on the starting block with an average F = 590 N force for a time interval of t =0.68 second. a. What is the speed, in m/s, of the sprinter at the end of the 0.68 s? b. What is the distance, in meters, the sprinter traveled during the 0.68 s time interval?

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Two masses are connected by a string, and suspended over a pulley. If one mass is 4.5 kg, and the other mass is 7.5 kg, what is the magnitude of the acceleration of the system? a. 6.1 m/s² b. 2.5 m/s² c. 3.7 m/s² d. 4.8 m/s² e. none of above