PHYSICS 1250 Study Guide - Quiz Guide: Page Layout

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turquoisegnu128

28 Sep 2018

School

Ohio State University

Department

Physics

Course

PHYSICS 1250

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All

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PHYSICS 1250 Full Course Notes

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Start quiz 20 minutes before end of class. Rec instructor: gilmer, pinchuk, klepinger, macro, ronquillo, adams, blomberg,yusuf. 1 meter (m) = 3. 281 feet 1 mile = 5280 feet 1 hour =3600 seconds |g|=9. 80m/s2 g=6. 67x10-11nm2/kg2 d/dx(axn)=naxn-1 xmdx= xm+1/(m+1), m -1 a =b axbx+ ayby+ azbz= |a|| b|cos . 2), u=mg(yf-yi) power=dw/dt or w/ t v=vi+at x-xi=vit+ at2 v2=vi. |ac|=v2/r v= r fext=ma |fc|=mv2/r f=-kx, | ff|= k|fn| 0 |ff| s|fn| |fg|=gm1m2/r2. Problem 2: a small block is sent through point a with speed 7. 7 m/s. It travels from a to c, h1=6. 5 m, h2=1. 0 m on a frictionless surface. What is the block"s speed at c: 7. 3 m/s, 11 m/s, 13 m/s, 69 m/s, can"t do, need the block"s mass. Problem 3: a floating block of ice is pushed through a displacement (in meters) d=11 -11 by a force (in newtons) f=186 +181 .

Related Questions

1. A block is placed on a plane whose angle of inclination is 30˚. The coefficients of static and kinetic friction for the block on the inclined plane are both 0.2. The block
(A) remains stationary on the inclined plane.
(B) accelerates down the inclined plane.
(C) travels down the inclined plane at a constant velocity.
(D) travels up the inclined plane at a constant velocity.
(E) accelerates up the inclined plane.

2. An object with a mass of 5.5 kg is allowed to slide from rest down an inclined plane. The plane makes an angle of 30˚ with the horizontal and is 72 m long. The coefficient of friction between the plane and the object is 0.35. The speed of the object at the bottom of the plane is?

3. A 5-kg object slides down a frictionless surface inclined at an angle of 30˚ from the horizontal. The total distance moved by the object along the plane is 10 meters. The work done on the object by the normal force of the surface is?

4. A mass m = 2.5 kg is sliding along a frictionless table with initial speed v as shown in the figure. It strikes a coiled spring that has a force constant k = 500 N/m and
compresses it a distance x=5.0 cm. The initial speed v of the block was..?

5. The graph shows how the position of a particle depends on time. Which choice is closest to the instantaneous speed of the particle at t = 3s?
(A) 0.40 m/s
(B) 0.67 m/s
(C) 0.75 m/s
(D) 1.50 m/s
(E) 2.22 m/s

6. Calculate the work done by a force, F = 2x i, along the
path (0, 0) -> P₁(2, 0) -> P2(2, 2).

turquoisearmadillo973

A particle of mass m is attachedbetween two identical springs on a horizontal frictionless table.Both springs have spring constant k and are initially un-stretched.If the particle is pulled a distance x along a directionperpendicular to the initial configuration of the springs, theforce exerted by the springs on the particle is given by F =-2kx(1-(L/sqrt(x^2+L^2)))

a) determine the amount of work done by this force in moving theparticle from x = A to x = 0.

b) show that the potential energy of the system is U(x) = kx^2 +2kL(L - sqrt(x^2 + L^2))

c) make a plot of U(x) versus x and identify all equilibriumpoints.

d) assume that m = 1.81 kg, L = 1.20 m and k = 40.0 N/m. If theparticle is pulled 0.500 m to the right and then released, what isits speed when it reaches the equilibrium point x = 0?

1. An object is dropped from a height.Once it is moving,which ofthe following statements are true,at least at one point?
a)its velocity is more than its accelerations
b)its velocity is less than its acceleration
c)its velocity is the same as its acceleration
d)its velocity is never equal to its acceleration

2. Which type of quantity is characterized by both magnitude anddirection?
a)scalar
b)vector
c)trigonometric
d)algebraic variable

3. A hiker walks 200m west and then walks 100m north. In whatdirection is her resulting displacement?
a)north
b)west
c)northwest
d)none of the answer is correct

4. Vector 1 is 7 units long and is at 70 degree. Vector 2 is 5units long and is at 225 degree. Vector 3 is a 3 units long and isat 150 degree. Which vector has equal magnitude components?
a)Vector 1
b)vector2
c)vector 3
d)none of the vectors has equal magnitude components??????

5. Which of the following is an example of the type of force thatacts at a distance?
a)gravitational
b)magnetic
c)electrical
d)all of the above

6. A crate weight W is being pushed across a horizontal surface bya force directed at an angle of 20 degrees below the horizontal.What is the magnitude of the normal force on the crate?
a)it is less then W
b)it equals W
c)it is more than W
d)none of the above since the coefficient of kinetic friction isnot given

7. The net force on an object is in the positive x-direction.Consider the following statements.
(i) The object can be moving in the negative x-direction.
(ii) The object can be speeding up.
(iii) The object can be slowing down.
(iv) The object can be moving in the positive y-direction.

Which of the statements are true?
a. (i) and (ii)
b. (ii) and (iii)
c. (iii) and (iv)
d. Choose this answer if all the statements are true.

8.The work done by static friction can be:
a. positive.
b. negative.
c. zero.
d. Any of the above.

9.The rate at which work is done is equivalent to which of thefollowing?
a. increase in potential energy
b. thermal energy
c. potential energy
d. power

10.The dimensional equivalent of the quantity impulse in terms ofthe fundamental quantities (mass, length,
time) is which of the following?
a. MLT-1
b. ML2T-2
c. MLT
d. MLT-2

11. The dimensional equivalence of the quantity "momentum" in termsof the fundamental quantities (mass,
length, time) is:
a. MLT-1.
b. ML2T-2.
c. MLT.
d. MLT-2.

12.In order for a satellite to be geosynchronous, its orbitmust:
a. go over the North and South Poles.
b. be over the equator.
c. be over a single longitude.
d. emit television signals.

13. The quantity "angular momentum" (in terms of the fundamentalquantities of mass, length, and time) is equivalent
to:
a. MLT-2.
b. ML2T-1.
c. ML2T-3.
d. ML3T.
d. MLT-2.

PHYSICS 1250 Study Guide - Quiz Guide: Page Layout

PHYSICS 1250 Full Course Notes

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