PHYS 1A Study Guide - Final Guide: One Direction

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magentabutterfly138

10 Jun 2020

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Scalars - a number or measurement that has no spatial direction associated with it. Vectors - a measurement that has both a magnitude (size) and direction associated with it. Position - the location of an object in space. Displacement - the net change in position from an initial location to a final location . Distance - the total path length traveled by an object. Vector addition - a method for combining vectors that takes both magnitude and direction into consdieration. Duration - the change in time from the start of an event to the end of an event. Speed - a moving object"s actual rate of change in position along its path of travel. Velocity - a moving object"s net rate of change in position across its (net) displacement. Acceleration - a moving object"s net rate of change in velocity ( a= v t a = t v )

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

I. v = +2.0 m/s, Δt = 2.0 s

II. v = +3.0 m/s, Δt = 2.0 s

III. v = -3.0 m/s, Δt = 2.0 s

Which option ranks the displacement of there objects in decreasing order?

a. I, II, III

b. II, III, I

c. II, I, III

d. III, II, I

11. Which of these defines acceleration? Choose the correct answer.

a. the change in velocity

b. the change in displacement

c. change of velocity over time

d. the rate of change of displacement

12. An object moves at a constant speed in the direction of the arrow.

Which of these describes the object's movement? Choose the correct answer.

a. positive velocity

b. negative velocity

c. positive acceleration

d. negative acceleration

mariabran12

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

PHYS 1A Study Guide - Final Guide: One Direction

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