You jog at 9.5 km/h for 5.0 km , then you jump into a car and drive an additional 19 km Part A With what average speed must you drive your car if your average speed for entire 24 km is to be 25 km/h? Express your answer using two significant figures. km/h Submit Request Answer
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- In World War II, there were several reported cases of airmen who jumped from their flaming airplanes with no parachute to escape certain death. Some fell about 20,000 feet (6000 m), and some of them survived, with few life-threatening injuries. For these lucky pilots, the tree branches and snow drifts on the ground allowed their deceleration to be relatively small. If we assume that a pilot's speed upon impact was 123 mph (54 m/s), then what was his deceleration? Assume that the trees and snow stopped him over a distance of 3.0 m.ven city Time (s) 0.5 0.0 -0.5 0.2 0.4 0.6 0.8 1.0 1.2 1.4 -1.0+ E-1.5+ 6. Interpreting Data Figure 1-17 is a posi- tion-time graph of the motion of a basketball thrown straight up. Use the graph to sketch the path of the basketball and t o sketch a velocity- time graph of the basketball's motion. a. Is the velocity of the basketball constant? b. Is the acceleration of the basketball constant? c. What is the initial velocity of the basketball? -2.0 -2.5 -3.0 -3.5 -4.0 -4.5 -5.0 -5.5 Figure 1-17 ter 1 Position (m)A motorcycle speed increases from 15 kilometres per hour to 60 kilometres per hour in 20 seconds. Solve average speed, distance travelled and acceleration. Answer in mks.
- Physics 30S Science & Technology 2240 Grant Ave. Winnipeg. MB R2C IL6 Shaflesbury High School Motion: Speed/Velocity & Acceleration Ad V = At a = Average Velocity, 1. A man jogs 5.0 km (5000 m) in 27 minutes. a) What is the time interval (At) in seconds? b) Calculate his average speed in metres per second (m/s). Average Acceleration, At 2. An object has a position of 13 metres west. 5.0 seconds later it's at 7 metres east. a) What was the initial position? b) What was the change of position or displacement (Ad)? c) What was the average velocity? 3. A world class sprinter runs 100.0 m in 8.90 s. What was his average speed? 4. A hiker gets lost in a forest. He walks half-way around a circle with a radius of 2.1 km in 2.0 hours. a) What distance did he walk? b) What was his average speed? c) What was his displacement? d) What was his average velocity? WE S C-2rr 5. A car has an average highway speed of 90 km/h or 25 m/s. At this speed; how long will it take to drive to Kenora which is 190…94 in x 114 in (24 cm x 29 cm) with Prongs EAR -rocket Portfolio Stenes, inc Distributed 3. A ball is thrown straight up with an initial velocity of 128 ft/sec., so that its height 844106 031076 (in feet) after t seconds is given by s(1) = -16t2 +128 A. What is the average velocity of the ball over the time intervals? a. [2, 3] b. [2, 2.5] c. [2. 2.1] B. What is the instantaneous velocity at time t 2? C. What is the instantaneous velocity at time t-5? Is the ball rising or falling? D. When will the ball hit the ground? An object is dropped from a certain height. It is known that it will fall a distance s, inA car starts from 2.00 m/s and accelerates at 4.00 m/s2 for 6.0 s, it coasts for 5.00 s, and then slows down at a rate of 2.00 m/s2to a stop. How far has it traveled, in meters? Your answer needs to have 3 significant figures, including the negative sign in your answer if needed. Do not include the positive sign if the answer is positive. No unit is needed in your answer, it is already given in the question statement.
- 11) An aiplane traveling north at 400 m/s is accelerated due east at a rate of 50 m/s for 6 s If the effects of air resistance and gravity are gnored, what is the final speed of the planc? A. 300 m/s ctivat B. 400 m/s 500 my s D. 700 m/sasa Ys beogl take this car to reach a velocity of 30 m/s east? How far will the car travel during this time? 3m152 4大号 At=? 7. An object's velocity curing a 10 second time interval is shown by the graph below: Velocity (m's) ou ml gnin AS Teboo Sni lovu 3- MYE 1+ Time (seconds) 10 s lieiio abrgAE w.un 0.0 i abn od to boor lacil 1 3 5 -1+ fooitelae ab -2+ Determine the object's total distance traveled and displacement. Show all work. 大-10sec AK-Xott'sat? よニ105cc Ax-o(0)t5 d=17.sm Ax-? bs 1291 mo do AA noitenfooon or onims Vo =omIs BJAt1= 0, the object's position is x = 2 m. Find the object's position at t= 2, t = 4, t = 7, andt = 10. Show all work. Saboo 01 o iloe l wol d 8. Is it possible to move with constant speed but not constant velocity? Explain your answer. 1es because velocity isaspecel of me obiect with Specifi cation of it's direct ion, boog ad A -to noilol hy the College BoardA jet accelerates at a constant rate from rest, traveling 900 m in 3.0 s. What is the magnitude of its acceleration, in m/s?? Your answer needs to have 2 significant figures, including the negative sign in your answer if needed. Do not include the positive sign if the answer is positive. No unit is needed in your answer, it is already given in the question statement.
- A runner travels at the following speeds: A. 11.5 km/hr for 3.71 min. B. 10.6 km/hr for 2.39 min. C. 14.5 km/hr for 1.92 min. Determine the average velocity over the entire interval and report your result in km/hr.Osama was testing his new car by racing with his fiend Adam, Osama was driving at 54.0 mile/hr, enters a one-way narrow subway. Osama then observed a Truck 100 m ahead traveling at a low constant speed 3.00 m/s. Osama used his brakes but can accelerate only at -2.00 m/s2 because the road was wet. Will there be an accident? Explain. If yes,Page 5 of 85at what time the accident occurs and how far into the subway. If no, determine the distance of closest approach between Osama’s car and the Truck. (1mile=1609m).A student begins at rest and then walks north at a speed of v1=0.65m/s. The student then turns south and walks at a speed of v2=0.28m/s. Take north to be the positive direction. a)What is the student's overall average velocity vavg, in meters per second, for the full trip assuming the student spent equal times at speeds v1 and v2? b) If the student travels in the stated directions for 30.0s30.0s at speed v1 and 20.0s at speed v2, what is the net displacement, in meters, during the trip? c) If it takes the student 1.2s to reach the speed v1, from rest, what is the magnitude, in meters per squared second, of the student’s average acceleration during that time?
