Log in
HomeStudy Guides420,000US230,000

PH 105 Midterm: PH105 spring16_exam1-soln

20 views9 pages
turquoisegnu128
31 Jan 2019
School
University of Alabama
Department
PH
Course
PH 105
Professor
All

For unlimited access to Study Guides, a Grade+ subscription is required.

Document Summary

Ph105 exam 1 solution: the graph in the gure shows the position of an object as a function of time. The letters a-e represent particular moments of time. 0 n o i t i s o. Solution: speed is the absolute value of the slope of the x t curve, so the region with the the largest slope (in magnitude, positive or negative) has the largest speed. That is region c: two objects have masses m and 5m, respectively. Solution: the time it takes depends only on the length of the ramp and acceleration, and is independent of mass: a child on a sled starts from rest at the top of a 15 slope. Assume that frictional forces may be neglected: 147 m, 293 m, 586 m, 1130 m. Given a ramp of angle , the acceleration is +g sin , with the positive direction being down the ramp. With zero initial velocity, we can write the displacement x(t) as.

Get access

Grade+
$40 USD/m
Billed monthly
Grade+
Homework Help
Study Guides
Textbook Solutions
Class Notes
Textbook Notes
Booster Class
10 Verified Answers

Related Documents

PH 105
Final Exam
Study Guide
PH 105 Midterm: ph105_spring16_exam1
turquoisegnu128
PH 105
Final Exam
Study Guide
PH 105 Midterm: PH105 Exam2A-with-key
turquoisegnu128
PH 105
Final Exam
Study Guide
PH 105 Midterm: PH105 S18_exam1
turquoisegnu128

Related Questions

Two objects have masses m and 5m, respectively. They both are placed side by side on a frictionless inclined plane and allowed to slide down from rest. Two objects have masses m and 5m, respectively. They both are placed side by side on a frictionless inclined plane and allowed to slide down from rest.

A.The two objects reach the bottom of the incline at the same time.

B.It takes the lighter object 5 times longer to reach the bottom of the incline than the heavier object.

C.It takes the heavier object 10 times longer to reach the bottom of the incline than the lighter object.

D.It takes the heavier object 5 times longer to reach the bottom of the incline than the lighter object.

E.It takes the lighter object 10 times longer to reach the bottom of the incline than the heavier object.

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).