to the air-cart by a string and hung over pulley with the other end attached to an air-cart resting on a frictionless surface. The study of the motion of the system of masses will be used to determine the velocity of the masses from an analysis of the displacement versus time data. This velocity will then be used to calculate the acceleration of the system of masses and therefore the acceleration due to gravity. A spark timer will mark the motion at a frequency of 10 Hz (10 dots/s) on a strip of paper
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becomes taut. Calculate the impulse in the string when it jerks tight. (3 marks) (2 marks) 2. Particle A has velocity (8i – 3j) m s-1 and particle B has velocity (15i – 8j) m s-1 where i and j are perpendicular‚ horizontal unit vectors. (a) (b) (c) Find the speed of B. Find the velocity of B relative to A. (2 marks) (2 marks) Find the acute angle between the relative velocity found in part (b) and the vector i‚ giving your answer in degrees correct to 1 decimal place. (2 marks) 3. A
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Exam version: ## PHYS1112 General Physics I spring 2013‚ midterm Examination Name: _____________________________ 23 March 2013 Student ID:_________________________ Seat No.: ___________________________ Declaration of Academic Integrity: I confirm that I have answered the questions using only materials specifically approved for use in this examination‚ that all the answers are my own work‚ and that I have not received any assistance during the examination. Signature: _______________
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j D) 34.0 E) 1028 ^ ^ ^ ^ 5) ^ ^ 6) An object has a position given by r = [2.0 m + (5.0 m/s)t]i + [3.0 m - (1.0 m/s 2)t2 ]j. Determine the velocity of the object as a function of time. A) 5.4 m/s ^ ^ B) (5.0 m/s)i - [(1.0 m/s2 )t]j 6) C) 5.1 m/s D) (5.0 m/s)i - (1.0 m/s2 )j ^ ^ E) (5.0 m/s)i - [(2.0 m/s2 )t]j 7) An object has a velocity v 0 (t) = (3.00 m/s)i + (1.00 m/s)j at time t = 0.00 s. The acceleration of the object is a (t) = (2.00 m/s3 )ti + (1.00 m/s4 )t2j. If the object
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without working will gain no credit. Written by Shaun Armstrong & Chris Huffer Solomon Press These sheets may be copied for use solely by the purchaser’s institute. 1. A constant force‚ F‚ acts on a particle‚ P‚ of mass 5 kg causing its velocity to change from ( – 2i + j) m s-1 to (4i – 7j) m s-1 in 2 seconds. (a) (b) Find‚ in the form ai + bj‚ the acceleration of P. (2 marks) Show that the magnitude of F is 25 N and find‚ to the nearest degree‚ the acute angle between the line of action
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So basically Uniform‚ or constant‚ acceleration is a type of motion in which the velocity of an object changes equal amounts in equal time periods. Theoretical Background Anobject with a mass (m) travels with uniform velocity and uniform acceleration i.e. an object moving with a uniform or constant velocity or acceleration. The purpose of this experiment is to study the relationships between position‚ velocity‚ and acceleration in linear motion when the object moves with a constant acceleration
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represented in magnitude (scaled) and direction by arrows. velocity mass 10 N displacement speed 5 km VECTORS momentum distance : A distance is simply the length of a journey. displacement : displacement is the distance moved in a given direction. Speed / velocity speed : The speed of an object is the rate at which distance is increasing. velocity : velocity is the rate at which displacement is changing. Velocity should always be quoted with a direction. Average speed
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PHYSICS 1 FAP0015 Questions & Answers to Physics I Assignments Chapter 1 11. What‚ roughly‚ is the percent uncertainty in the volume of a spherical beach ball whose radius is r = 2.86 ± 0.09 m? Answer: To find the approximate uncertainty in the volume‚ calculate the volume for the specified radius‚ the minimum radius‚ and the maximum radius. Subtract the extreme volumes. The uncertainty in the volume is then half this variation in volume. 3 Vspecified = 4 π rspecified = 4 π ( 2.86 m ) = 9
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to be 20 km/hr. On his return trip along the same route‚ there is less traffic and the average speed is 30 km/hr. What is the average speed of Abdul’s trip? 10. A moving train is brought to rest within 20 sec by applying brakes. Find the initial velocity‚ if the retardation due to brakes is 2
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Many elements have contributed in the evolution of a constant changing society. Technology has been a huge instrument in society’s changes. Technology has opened the gates to unheard opportunities but at the same time‚ those same gates have allowed negative influences to occur within our society. Body image‚ transportation and social media are three outlets that technology has influenced both positively and negatively. Unrealistic expectations of body images pollute the minds of both young men
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