PHYS 1501Q Lecture Notes - Lecture 6: Parallelogram, International System Of Units

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coralcat765

7 Sep 2018

School

UConn

Department

Physics

Course

PHYS 1501Q

Professor

Soroush Khosravi Dehaghi, Robert McCutcheon

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PHYS 1501Q Lecture Notes - Lecture 5: International System Of Units

PHYS 1501Q Lecture Notes - Lecture 6: Parallelogram, International System Of Units

PHYS 1501Q Lecture Notes - Lecture 7: Projectile Motion, International System Of Units

Document Summary

Physics 1501q - lecture 5 - 1-d and 2-d kinematics 9/7/18. Key (in si units): t = time (s) x = distance (m) v = velocity (m/s) a = acceleration (m/ = change in g = gravity = 9. 81 m/ s2. Free fall: no other forces are acting on the object. G does not depend on the mass of the falling object. Dropping two objects from the same height, neglecting air resistance, will take the same amount of time to reach the ground, regardless of mass. Vectors vs. scalars: vectors have direction and magnitude, while scalars have only magnitude. Vector format: , where x, y, and z are components. If you have two vectors, a and b, the vector a+b has components equal to the sum of the x-components, the y-components, and the z-components. For example, a = <1, 2, 1> and b = A+b = <1+(-4), 2+3, 1+0> =

Related Questions

1. What is the difference between speed and velocity?

a. Speed is an average quantity while velocity is not.

b. Velocity contains information about the direction of motion while speed does not.

c. Speed is measured in mph, while velocity is measure in m/s.

d. The concept of speed applies only to objects that are neither. speeding up or slowing down, while velocity applies to every kind of motion.

e. Speed is used to measure how fast an object is moving in a straight line, while velocity is used for objects moving along curved paths.

2. The quantity 2.67 x 10³ has how many significant figures?

3. If Libby walks 100 m to the right, then 200 m to the left, her net displacement vector points

a. to the right.

b. to the left.

c. has zero length.

d. cannot tell without more information.

4. Velocity vectors point

a. in the same direction as displacement vectors.

b. in the opposite direction as displacement vectors.

c. perpendicular to displacement vectors.

d. in the same direction as acceleration vectors.

e. velocity is not represented by a vector.

chocolatemouse942

Object A collides on a horizontal frictionless surface with an initially stationary target, object X. The initial and final velocities of object A are shown. The final velocity of object X is not given.

a). At an instant during the collision, is the net force on object A zero or non-zero?

b) [During the collision, is the momentum of object A conserved? Explain. Is the momentum of the system consisting of objects A and X conserved? Explain. On the same horizontal surface, object C collides with an initially stationary target, object Z. The initial speeds of objects C and A are the same, and m_x = m_z > m_A = m_c. After the collisions, object C moves in the direction shown and has the same final speed as object A. In the space below, copy the vectors v_C1 and v_cr with their tails together. Use these vectors to draw the change in velocity vector for glider C, Delta v_c. Is the magnitude of the change in velocity vector of object A greater than, less than, or equal to the magnitude of the change in velocity vector of object C? Explain? Is the magnitude of the change in the momentum vector of object A greater than, less than, or equal to the magnitude of the change in the momentum vector of object C? Explain? Is the final speed of object X greater than, less than, or equal to the final speed of object Z? Explain. Consider the following incorrect statement: Gliders A and C have some change in momentum. They have the same mass, and because they have the same initial speed and same final speed. Delta-v is the same for each of.them." Discuss the error(s) in the reasoning.

sangriaporcupine175

1. If an object moves with constant acceleration, its velocity a) must be constant also b) always decrease c) increases by the same amount each second d)change by varying amount depending on its speed.

2. A man leans over the edge of a cliff and throws a rock upward at 4.9 m/s. Neglecting air resistance, two seconds later the rock's speed is a) 9.8 m/s b) 14.7 m/s c) 4.98 m/s d) zero e) none of the above

3. Twelve seconds after starting from rest, an object falling freely will have a speed of a) 10 m/s b) 50 m/s c) more than 100 m/s d)100 m/s.

4. A ball is thrown 125 meters upward and then falls the same distance back to Earth. Neglecting air resistance, its total time in the air is about 10 seconds. about 15 seconds. about 5 seconds. more than 20 seconds.

bluecod895

PHYS 1501Q Lecture Notes - Lecture 6: Parallelogram, International System Of Units

PHYS 1501Q Lecture Notes - Lecture 5: International System Of Units

PHYS 1501Q Lecture Notes - Lecture 6: Parallelogram, International System Of Units

PHYS 1501Q Lecture Notes - Lecture 7: Projectile Motion, International System Of Units

Document Summary

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Related textbook solutions

Physics: Principles with Applications

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