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Information and answers to various physics-related questions from a university midterm exam. The questions cover topics such as particle motion, kinematics, friction, and vector calculations. Students can use this document as a study resource to review concepts and prepare for exams.
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Physics 170 Midterm 1
Name, Roster #
A particle of mass 2.0 grams moving in one dimension has a position as a function of time given by m m x ( t )=at 3 - b t2 where: a=2.0 and b=6.0. Assume the positive x direction points S S to the right
Answer
Answer
~ ( 3 = ) l a - , -12 + ~ 4 5 z " -
Answer
Answer
Physics 170 Midterm 1
Name, Roster #
The following information pertains to questions 6- 9: The planet "Henweigh" is very useful for performing kinematics experiments because it has no atmosphere, and the acceleration of gravity close to the surface is 5.00 m/s2 down. On the planet "Henweigh, a ball is kicked from the ground such that the horizontal component of its initial velocity is
a. 22.0 m cz-3 c. 31.6 m (^) on d. 37.5 m e. 40.0 m f. 49.4 m
a. When it has a negative acceleration. b. When it has a positive acceleration. O w h e n it's velocity and acceleration are pointing in the same direction. d. When it's velocity and acceleration are pointing in opposite directions.
Name, Roster # Physics 170 Midterm 1
a. - b. - c. 1 d. f
e. f f a g. J I,.\
---- Scale
b. 70.0N c. 98.0 N d. 126N e. 136 N
The following information pertains to questions 18-20:
Giventhetwovectors: 2=+2;-4f+3i g=-3f+5i
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3 - a k a ; - 1 j
A 5 4flca3e -3 ,- ,I A - f l. C>>^ cl.^^4^4^1 -^1 A^5^1 0 5 co5 - A
Answer
Answer ( 3 1
Answer
Name, Roster # Physics 170 Midterm 1, Problem 1
Our hero Fred (his mass is 100 kg) has taken up Olympic Weightlifting. Fred is shown below lifting a barbell of mass 220 kg. At the instant shown, the weights have an upward acceleration of 2.00 rn/s
a. On the figures of Fred and the barbell shown below complete the Free - body
J b. What is the magnitude and direction of the force exerted on the barbell by Fred at the instant shown? (7 points)
c. What is the magnitude and direction of the normal force exerted on Fred's feet by the floor at the instant shown?(7 points)