1. An airplane accelerates down a runway at 3.20 m/s? for 32.8 seconds until is finally lifts off the ground. Determine the distance traveled before takeoff.

9. An object initially at rest experiences an acceleration of 2.00 m/s2 for 5.50 s then travels at that constant velocity for another 8.60 s. What is the magnitude of the object's average velocity over the 14.1 s interval? m/s 60 ssfor 60 ssfo sfo ssf60 s

5. You wake up in a strange room, with opaque walls, and no visible doors or windows. though there is a window on the floor, and you can see that you're in a rocket that has just taken off from the surface of an alien planet. By taking careful measurements out that window you determine that the rocket is accelerating upward at 5.31 m/s^2. When you drop a ball from a height of 2.27 m, it hits the floor 0.290 s later. What is the value of g for the alien world below you?     48.7 m/s^2     63.8 m/s^2     56.3 m/s^2     82.8 m/s^2

2. A child running around in a field has the following position and velocity at time t = 0: x = 1.5 m, y = 2.0 m Vx = -3.5 m/s, vy=-1.0 m/s At time t = 2.5 s, it has the following position and velocity: x = -2.0 m, y = 1.5 m vx = -0.50 m/s, v, = 2.0 m/s Using this information, find the child's average velocity and average acceleration during that time interval. Write your answers in unit vector notation.

From a height of 11.0 m an object is sent directly downward with an initial velocity of 1.2 m/s. Determine how long the object stays in the air before touching the ground below. 1.38 s 1.20 s 1.86 s ○ 1.00 s

6. A ball is thrown upward with a velocity of 4.5 m/s. Its speed and the magnitude of its acceleration at the highest point (a) are both equal to zero (b) are given by 9.81 m/s and 0 m/s², respectively (c) are given by 0 m/s and 9.81 m/s², respectively (d) cannot be predicted unless the height is known Answer: 7. Which of the following statements about a projectile is not true? Assume that the air resistance is negligible. (a) Its motion is in two dimensions. (b) The only acceleration is in the vertical direction. (c) Its velocity in the horizontal direction remains the same throughout the flight. (d) The velocity at the highest point of its trajectory is zero. Answer:

A plane needs to drop supplies off to victims of natural disasters around the world. The first stop is for flood victims but they must drop the box so it lands perfectly on a target. If they are flying at 154 m/s and are 90.0 m above the ground, what distance before the target should they drop the package?  35.9 m 819 m 660. m 501 m

15. A runner runs one lap on a 400 m oval in 50 s (i.e. he returns to his starting point in 50 s). What is the magnitude of his average velocity for this 50 s interval? 4.0 m/s 6.0 m/s     8.0 m/s 0.80 m/s zero 14. The magnitudes of two vectors  A and  B are 13 units and 8 units, respectively. What are the largest and smallest possible values for the magnitude of the resultant vector R = A +B ? largest  units smallest  units

The position of an object moving along the x -axis is given by x = 5.0m 4.0 t m + 2.0 t² m. How many times does this object pass through the point x=0? A. twice, first moving in the positive x-direction, then moving in the negative x-direction B. twice, first moving in the negative x-direction, then moving in the positive x-direction C. only once, moving in the positive x-direction D. only once, moving in the negative x-direction E. never

A motorist travels 160 km at 80 km/h and 160 km at 100 km/h. What is the average speed of the motorist for this trip? (A) D) 91 km/h B C) 90 km/h E) No answer D A) 84 km/h E) B) 89 km/h