Acceleration is a rate of change of velocity.     Average velocity is the rate at which an object changes its position from one place to another.     At constant velocity, the object is moving in a straight line with zero acceleration.     At constant velocity, the object is moving in a straight line at a varying speed.     The sum of two or more vectors is represented by a resultant vector

A car is 3.0 km west of a traffic light at t = 0 and 7.0 km east of the light at t = 8.0 min. Assume the origin of the coordinate system is the light and the positive x direction is eastward. (a) what are the car’s position vectors at these two times? (b) what is the car’s displacement between 0 min and 6.0 min?

A ball is shot from the ground into the air. At a height of 10.0 m, its velocity is v=7.70(1+)) m/s with i vector horizontal towards right and J vector vertically upward. What is the angle (below the horizontal) of the ball's velocity just before it hits the ground? (ignore the air resistance) Analysis of projectile motion Motion diagram of a kicked football كلية العلوم احتراحد الخيارات degrees 72 degrees 45 degrees 74 degrees 54 degrees 64

Scenario: A toy rocket is launched straight upward from a pad 10 ft above ground level with an initial velocity of 80 ft/sec. Use the general formula for the vertical position (height) of an object moving under the influence of gravity  where s0 is initial vertical position, v0 is initial velocity, and s is vertical position of the object.   Define a model (equation) to express the vertical position (height) of the rocket s (in meters) above ground level t seconds after launch. Let g = 32 ft/sec2.

Chapter 02, Problem 10 In reaching her destination, a backpacker walks with an average velocity of 1.26 m/s, due west. This average velocity results, because she hikes for 6.62 km with an average velocity of 2.54 m/s due west, turns around, and hikes with an average velocity of 0.381 m/s due east. How far east did she walk (in kilometers)? dw VE West East dɛ Number Units the tolerance is +/-2% Click if you would like to Show Work for this question: Open Show Work

A plane flies 493 km east from city A to city B in 45.0 min and then 983 km south from city B to city C in 1.30 h. For the total trip, what are the (a) magnitude and (b) direction of the plane's displacement, the (c) magnitude and (d) direction of its average velocity, and (e) its average speed? Give your angles as positive or negative values of magnitude less than 180 degrees, measured from the +x direction (east). (a) Number i Units (b) Number Units (c) Number i Units (d) Number i Units (e) Number Units II

A runner, jogging along a straight-line path, starts at a position 60.0 m east of a milestone marker and heads west. After a short time interval he is 15.7 m west of the mile marker. Choose east to be the positive x-direction. What is the runner’s displacement from his starting point? Enter a positive value if the displacement is toward east of the milestone and a negative value if the displacement is toward west of the milestone.

The vector position of a particle varies in time according to the expression r = 9.00 î - 8.00t? ĵ where r is in meters and t is in seconds. (a) Find an expression for the velocity of the particle as a function of time, (Use any variable or symbol stated above as necessary.) m/s (b) Determine the acceleration of the particle as a function of time. (Use any variable or symbol stated above as necessary.) a = m/s2 (c) Calculate the particle's position and velocity at t = 3.00 s. ř = m/s Type here to search 近

A person walks 2.80 km north and then 2.00 km east, all in 2.20 hours.   (a) What is the magnitude (in km) and direction (in degrees north of east) of her displacement during the given time? (b) What is the magnitude (in km/h) and direction (in degrees north of east) of her average velocity during the given time?(c) What was her average speed (in km/h) during the same time interval?

The position vector 4.70t|i+ [et + ft2 locates a particle as a function of time t. Vector is in meters, t is in seconds, and factors e and f are constants. The figure gives the angle e of the particle's direction of travel as a function of time (0 is measured from the positive direction of the x axis). What are (a) factor e and (b) factor f, including units? 20° 0° 10 20 -20° t (s) (a) Number Units (b) Number Units