Cengage Learn Cengage Learn X WA#2-Motions - WA#2-Motions - X webassign.net/web/Student/Assignment-Responses/last?dep=31334029 C Homework Hel X * 39363806 (384 | (3) IP Subnettin x + 4. [-/2 Points] DETAILS SERCP11 2.1.P.010. Two cars travel in the same direction along a straight highway, one at a constant speed of 55 mi/h and the other at 60 mi/h. (a) Assuming they start at the same point, how much sooner does the faster car arrive at a destination 13 mi away? min (b) How far must the faster car travel before it has a 15-min lead on the slower car? mi 5. [-/2 Points] DETAILS SERCP11 2.1.P.013.MI. A person takes a trip, driving with a constant speed of 96.5 km/h, except for a 22.0-min rest stop. If the person's average speed is 60.2 km/h, find the following. (a) How much time is spent on the trip? h (b) How far does the person travel? km EJ MY NOTES ASK YOUR TEACHER MY NOTES ASK YOUR TEACHER MY NOTES ASK YOUR TEACHER To qualify for the finals in a racing event, a race car must achieve an average speed of 255 km/h on a track with a total length of 2,200 m. If a particular car covers the first half of the track at an average speed of 210 km/h, what minimum average speed must it have in the second half of the event in order to qualify? 6. [-/1 Points] DETAILS km/h SERCP11 2.1.P.015. 7. [-/2 Points] DETAILS SERCP11 2.3.OP.029. -9C Partly cloudy S P O MY NOTES ASK YOUR TEACHER ^ ENG INTL 10:24 PM 2023-02-02 2 Cengage Learn Cengage Learn X WA#2-Motions - WA#2-Motions - X C webassign.net/web/Student/Assignment-Responses/last?dep=31334029 7. [-/2 Points] DETAILS SERCP11 2.3.OP.029. Homework Hel X * 39363806 (384 | (3) IP Subnettin x + The brakes are applied to a moving truck, causing it to uniformly slow down. While slowing, it moves a distance of 40.0 m in 7.85 s to a final velocity of 1.65 m/s, at which point the brakes are released. (a) What was its initial speed (in m/s), just before the brakes were applied? m/s (b) What was its acceleration (in m/s) while the brakes were applied? (Assume the initial direction of motion is the positive direction. Indicate the direction with the sign of your answer.) m/s 8. [-/4 Points] DETAILS SERCP11 2.3.OP.032. A particle moves along one dimension with a constant acceleration of 3.35 m/s over a time interval. At the end of this interval it has reached a velocity of 10.6 m/s. (a) If its original velocity is 5.30 m/s, what is its displacement (in m) during the time interval? m (b) What is the distance it travels (in m) during this interval? m EJ MY NOTES ASK YOUR TEACHER MY NOTES ASK YOUR TEACHER (c) A second particle moves in one dimension, also with a constant acceleration of 3.35 m/s, but over some different time interval. Like the first particle, its velocity at the end of the interval is 10.6 m/s, but its initial velocity is -5.30 m/s. What is the displacement (in m) of the second particle over this interval? m (d) What is the total distance traveled (in m) by the second particle in part (c), during the interval in part (c)? m 9. [-/2 Points] DETAILS SERCP11 2.3.P.034. -9C Partly cloudy S P O > MY NOTES ASK YOUR TEACHER ENG INTL 10:24 PM 2023-02-02 2 Cengage Learn Cengage Learn X WA#2-Motions - WA#2-Motions - X C webassign.net/web/Student/Assignment-Responses/last?dep=31334029 Your last submission is used for your score. Homework Hel X * 39363806 (384 | (3) IP Subnettin x + EJ MY NOTES ASK YOUR TEACHER Nerve impulses in a human body travel at a speed of about 100 m/s. Suppose a man accidentally stubs his toe. About how much time does it take the nerve impulse to travel from the foot to the brain (in s)? Assume the man is 1.70 m tall and the nerve impulse travels at uniform speed. S 1. [-/1 Points] DETAILS SERCP11 2.1.OP.001. 2. [-/2 Points] DETAILS SERCP11 2.1.OP.003. MY NOTES ASK YOUR TEACHER A motorist on a road trip drives a car at different constant speeds over several legs of the trip. He drives for 20.0 min at 55.0 km/h, 8.0 min at 70.0 km/h, and 60.0 min at 55.0 km/h and spends 15.0 min eating lunch and buying gas. (a) What is the total distance traveled over the entire trip (in km)? km (b) What is the average speed for the entire trip (in km/h)? km/h 3. [-/2 Points] DETAILS SERCP11 2.1.P.002. Light travels at a speed of about 3.0 108 m/s. (a) How many miles does a pulse of light travel in a time interval of 0.1 s, which is about the blink of an eye? Ax = mi (b) Compare this distance to the diameter of Earth. (Use 6.38 106 m for the radius of the Earth.) Ax -9C Partly cloudy S P O MY NOTES ASK YOUR TEACHER ENG INTL 10:23 PM 2023-02-02 2