Question: A person drives a cart along a straight track. The velocity of the cart changes over time as shown in the graph. What is the average acceleration of the cart between t 2 s and t 7 s? 10 Time (s) A. -5 m/s? B. -2 m/s? C. -3.3 m/s? 2 m/s? D. E. 3.3 m/s Velocity (m/s)
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- This is the velocity vs time graph. I would like to see how the position vs time graph will look like.The Road Runner steps off a ledge and drops to the ground in 0.50s. What is Road Runner's velocity just before he hits? 9.8 m/s -4.9 m/s .49 m/s 4.9 m/sA bee flies from a petunia to a marigold at an average speed of 3 feet per second. Immediately upon reaching the marigold the bee turns around and flies back to the petunia at an average speed of 6 feet per second, following his original path. What was the bee’s average speed for the round trip? a. 3 feet per second b. 4 feet per second c. 6 feet per second d. 4.5 feet per second
- The velocity-versus-time graph for the vertical jump of a green leafhopper, a small insect, is shown. This insect is unusual because it jumps with nearly constant acceleration.a. Estimate the leafhopper’s acceleration.b. About how far does it move during this phase of its jump?A high-performance sports car can go from 0 to 100 mph (44.7 m/s) in 7.9s. a) What is the car's average acceleration? b) The same car can come to a complete stop from 30 m/s in about 3.2 s. What is its average acceleration?The velocity vs. time graph for an object in motion is shown below. What is the total distance traveled by the object? velocity vs time 2.5 2 1.5 1 0.5 1 2 4 5 -0.5 -1 -1.5 time (s) 16 m 4 m 8 m 2 m 3. velocity (m/s) O O O
- A motorist starts from rest and traveled as seen in the speed-time graph. The total distance traveled and the average velocity in m/s for the distance traveled is 1.5 3.0 4.5 6.0 7.5 Time in minutes Select one: O a. 7.5 km, 4.5 m/s b. 10 km, 1.5 m/s c. 4.5 km, 10 m/s Reply... Speed in km/h :Speed (km/h) Time (s) 0.0 0 10 20 30 40 50 60 70 80 12. The Tesla Model S-Can accelerate to high speeds very quickly. The table below shows test data for the Tesla Model S as it travels along a straight line. a. Sketch a velocity vs time graph for this car. 90 100 110 120 b. C. 0.2 0.4 0.6 0.9 1.2 1.6 2.0 2.4 2.9 3.5 4.1 4.8 140 120 iii. iv. 100 80 60 How is the acceleration of this car best described? Zero? Constant but not zero? Increasing? Decreasing? Something else? Explain how you can tell. + What is the car's average acceleration in m/s² for the following times: i. ii. Osto 0.9 s 0.9 to 2.0 s 2.0 to 2.9 s 2.9 to 4.1 s v. 0 to 4.1 s Approximately how far has the Model S travelled once it reaches 120 km/h?4. What was the initial velocity of an object that moved 100 m in 5.60 s reaching a final velocity of 15.0 m/s in that time? Was the object speeding up or slowing down? 5. A car traveling at 40 km/h accelerates at 2.3 m/s² for 2.7 s. How far has it traveled in that time? What is its final velocity?
- A ball is thrown straight upward from a height of 3.2 m with a velocity of 13.0 m/s. a. What is the maximum height the ball reaches? b. How long does it take the ball to reach the maximum height? c. What is the total time the ball is in the air? d. With what velocity does the ball impact the surface?Marbles are shipped in a cubic packing crate with a height of 2m. The marbles are solid glass spheres of 1cm diameter. Originally, the marbles are carefully packed in a simple cubic arrangement. In shipping, the marbles settle to the densest cubic packing arrangement. a) How many marbles are shipped in the crate? b)When the packing crate is opened at its destination, how far down from the top of the crate is the top layer of marbles?Two oppositely charged but otherwise identical conducting plates of area 2.50 square centimeters are separated by a dielectric 1.80 millimeters thick, with a dielectric constant of K = 3.60. The Compute the magnitude of the charge per unit area o on the conducting plate. Express your answer in coulombs per square meter to three significant figures. resultant electric field in the dielectric is 1.20 × 106 volts per meter. V AZO ? C/m? Part B Compute the magnitude of the charge per unit area o1 on the surfaces of the dielectric. Express your answer using three significant figures. ? 01 = C/m?