If Yomi is walking 3 m/s to the north and David is walking 3 m/s to the west, then which of the following is TRUE? O They have the same speed and different velocities. O They have the same speed and velocity. O They have the same velocity and different speeds. O They have different speeds and different velocities.
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- Consider the following combinations of signs and values for the velocity and acceleration of a particle with respect to a one-dimensional x-axis: Velocity Acceleration a. Positive Positive b. Positive Negative c. Positive Zero d. Negative Positive e. Negative Negative f. Negative Zero g. Zero Positive h. Zero Negative Describe what the particle is doing in each case and give a real-life example for an automobile on an east-west one-dimensional axis, with east considered the positive direction.An airplane traveling north at 400 m/s is accelerated due east at a rate of 50 m/s² for 6 s. If the effects of air resistance and gravity are ignored, what is the final speed, in m/s, of the plane? O 300 O 700 O 400 O 800 O 500Which one of the following objects has a average speed of 20 mi/hour? O A car moves a distance of 40 miles and changes its velocity by 20 mi/hr after 1 hour. O A car moves a distance of 20 miles and is 20 miles from the starting point after 4 hours. O A car moves a diştance of 40 miles and is 20 miles from the starting point after 1 hour. O A car moves a distance of 40 miles and is 20 miles from the starting point after 2 hours. ssionld-D464133958#
- Which of the following statements describe an object moving with 1.0 m/s? acceleration? O The object spends one second to cover one meter. O The object moves with increasing acceleration. O The object covers distance linearly. O The object adds one meter per second in its velocity every second.One aeroplane travels due north at 300km/h while another travels due south at 300km/h. Are their speeds the same? Are their velocities the same? Explain.What should a graph of the velocity vs time look like if it shows an object moving to the left at a constant velocity? Select one: O An upwards curved parabola. O A downwards curved parabola. O A straight line with zero slope that is below the x-axis. O A straight line sloping downward. O A straight line sloping upward. O A straight line with zero slope that is above the x-axis.
- 6 40 4:05 O O 6.40 A (VPN KB/S 79 At time t= 0, a car and a truck are side by side on a freeway: car's velocity just then is zero car's constant acceleration is 6.0 m/s2 truck's velocity just then is 8.00 m/s truck's constant acceleration is 2.00 m/s2 How far down the road is the point where the car and truck will again be side by side? Number i Units ()Car A was traveling east at high speed when it collided at point O with car B , which was traveling north at 45 mi/h. Car C , which was traveling west at 60 mi/h, was 32 ft east and 10 ft north of point O at the time of the collision. Because the pavement was wet, the driver of car C could not prevent his car from sliding into the other two cars, and the three cars, stuck together, kept sliding until they hit the utility pole p. Knowing that the weights of cars A, B, and C are, respectively, 3000 lb, 2600 lb, and 2400 lb, and neglecting the forces exerted on the cars by the wet pavement, solve the problems indicated.Knowing that the coordinates of the utility pole are xp= 46 ft and yp = 59 ft, determine (a) the time elapsed from the first collision to the stop at P,(b) the speed of car A.One airplane travels due north at 300 km/h while another travels due south at 300 km/h. Are their speeds the same? Are their velocities the same? Explain.
- A particle at rest undergoes an acceleration of 2.1 m/s2 to the right and 3.9 m/s2 up. a)What is its speed after 5 s in m/s? b)What is its direction with respect to the horizontal at this time? Answer between −180◦ and +180◦.Which one of the following objects has a average velocity of 20 mi/hour? O A car moves a distance of 20 miles and is 20 miles from the starting point after 4 hours. O A car moves a distance of 40 miles and is 20 miles from the starting point after 2 hours. O A car moves a diştance of 40 miles and changes its velocity by 20 mi/hr after 1 hour. O A car moves a distance of 40 miles and is 20 miles from the starting point after 1 hour 6 7 8 9,4. A tourist throws a rock with an initial velocity of 8.0 m/s [down] from a scenic overlook into the Grand Canyon. What is the velocity and the displacement of the rock at a) 2.0 s? b) 6.0 s? 5. A boy throws a rock into a 10.0 m deep well at 4.00 m/s [down]. a) What is the velocity of the rock when it hits the bottom of the well? b) How long will it take to hit the bottom of the well? to tal disdaces 6. A flowerpot drops off the roof of a tall building. a) What is the velocity of the flowerpot at the end of 3.00 seconds of its fall? b) What is the velocity at the end of 4.00 seconds of its fall? c) What is the average velocity for the fourth second of the fall? d) What is the distance travelled during the fourth second? Vaug= 7. Two stones are dropped 1.00 s apart. How far apart are the two stones by the time the first one has reached a speed of 14.7 m/s?