Comparing average acceleration and instantaneous acceleration, a. average acceleration is not a vector quantity and therefore doesn’t include direction. b. both terms sometimes refer to the same quantity. c. the two terms never refer to the same quantity. d. none of the above apply.

9. A particle currently has positive displacement and negative velocity and always has constant positive acceleration. Which one of the following statements must be true about the particle? A. Its speed is currently increasing. B. Its speed is currently decreasing. C. Its velocity will always be negative. D. Its displacement will eventually become negative.

An automobile with an initial speed of 20 m/s accelerates at a rate of 5 m/s2. Use one of your kinematic equations and find how fast the car is moving after accelerating for 3 seconds.    a. 15 m/s.   b. 225.5 m/s.   c. 35 m/s.   d. 400 m/s.

An FBI Tactical Operations Team agent uses a high tech sling shot to launch an object from the roof of Building A. She hopes that the object will land on the roof of Building B. There is a 5.00 m wide alley between the two buildings, as shown in the figure. At the instant of its launch, the object has an initial velocity of 6.72 m/s directed 30 degrees above the horizontal. At the instant of its launch, the object is located 0.400 m above the roof of Building A, at a horizontal distance of 0.500 m from the edge of Building A, and 2.00 m above the level of the roof of Building B, as shown in the Figure. Treat the object as a point g = 9.80m 2. particle. Assume that air resistance is negligible, although it would not be. Assume that The near side of Building B 30° 0.400 m | 2.00 m b.500 m 5.00 m Alley 1. How much time does it take the object to reach the highest point in its trajectory? A. 0.594 s. B. 0.686 s. C. 0.859 s. D. 0.343 s. E. 0.561 s. 2. At the instant when the object passes…

How long will it take a boat, moving at 5.6 m/s, to travel 100 meters? a.17.9 seconds.              c. 0.056 seconds. b. 100 seconds.              d. 560 seconds.

10.A kangaroo is capable of jumping to 250 cm height. Determine time taken in jump and takeoff speed of the kangaroo.

QUESTION 5 Which of the following is not being described by a vector? a. A car travels at a constant speed of 20 m/s due east. b. A camper sees lightning strike 600 m away. C. A spaceship travels in a straight line from the earth to the moon. d. The position of a ship relative to an observer in a lighthouse is 3.0 miles at 37° N of E. e. The acceleration due to gravity acting on a falling brick is 9.81 m/s verticallky downward.

During 55 successive 1.001.00 min intervals, a runner moves at the following constant speeds: 0.4000.400 km/min, 0.2000.200 km/min, 0.1100.110 km/min, 0.1100.110 km/min, and 0.3600.360 km/min. a.) Find the total distance traveled. b.) Find the average speed.

An object moves along the xy-plane. At some instant, its velocity and acceleration are - (3 m/s) } , ā = (0.5 m/s²) î – (0.2 m/s²) j. At this instant, the object is 7. = A. speeding up and following a curved path. B. speeding up and moving in a straight line. C. slowing down and following a curved path. D. slowing down and moving in a straight line. E. none of these.

3. An object is dropped from a height. a. Describe its velocity as its falls to the ground. b. Describe its acceleration as it falls to the ground.