PHYA10H3 Chapter Notes - Chapter 1: Scientific Notation, Significant Figures, Projectile Motion

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lemonmanatee720

15 Jan 2018

School

UTSC

Department

Physics and Astrophysics

Course

PHYA10H3

Professor

Salam Tawfiq

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Document Summary

Four basic types of motion: linear, circular, projectile, rotational. Motion is defined as the change of an object"s position with time. Linear, circular, and projectile motion are types of translational motion. Rotational motion is different because the object moves but does not change position. The path along which the object moves is the trajectory. Making a motion diagram a frame is a single image taken from a set of images at a given rate motion diagrams show an object"s position at several equally spaced instants of time. Modeling is stripping away the details to focus on essential features. Models are highly simplified pictures of reality while still capturing the essence of what we want to study. Descriptive models: essential characteristics and properties of a phenomenon in the simplest terms. Contains predictive power whether a model explains our observations. Motion of the object as a whole is not influenced by shape and size.

Related Questions

Draw motion diagrams for

(a) an object moving to the right at a constant speed,

(b) an object moving to the right and speeding up at a constant rate,

(d) an object moving to the left and speeding up at a constant rate, and

(e) An object moving to the left and slowing down at a constant rate.

(f) How would your drawings change if changes in speed were not uniform; that is, if the speed were not changing at a constant rate?

amethysthound558

An object that moves along a straight line has the velocity-versus-time graph shown in the figure below. At time t = 0, the object has position x = 0.

a. At time t = 5 s, is the acceleration of the object positive, negative, or zero?

b. At time t = 8 s, is the object speeding up, slowing down, or moving with constant speed?

c. Write an expression for the position of the object as a function of time.

d. Use your expression from part (c) to determine (if any) at which the object reaches its maximum position.

ultramarineprairie-dog401

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

PHYA10H3 Chapter Notes - Chapter 1: Scientific Notation, Significant Figures, Projectile Motion

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