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- Problem 3: An object is thrown straight down from the top of a building that is 32 m high. The object's initial velocity is 22 m/s. What is its speed when it reaches the ground in m/s? Numeric : A numeric value is expected and not an expression. V =A group of college students eager to get to Florida on a spring break drove the 750-mi trip with only minimum stops. They computed their average speed for the trip to be 55.0 mi/h. How many hours did the trip take?A rock is thrown directly upward from the edge of the roof of a building that is 66.2 meters tall. The rock misses the building on its way down and is observed to strike the ground 4.00 seconds after being thrown. Neglect any effects of air resistance. With what speed was the rock thrown? ANSWER FORMAT: space EXAMPLE: 10.0 N
- A small block has constant acceleration as it slides down a frictionless incline. The block is released from rest at the top of the incline, and its speed after it has traveled 6.60 m to the bottom of the incline is 3.80 m/s. Q: What is the speed of the block when it is 3.80 m from the top of the incline?Jeremy is very distraught about all the work he has due for school. One day he just could not take it anymore and decides to jump from the roof of the school. While standing on the edge of the roof Jeremy starts to think. His thoughts turn to his favorite class (physics). He knows that the roof of the school is 11.2 meters above the sidewalk. Jeremy calculates the following: a) His velocity just before he would hit the ground. b) How long it would take for him to hit the ground. c) His velocity after 1.15 seconds. After seeing these answers he decided not to jump. Physics saves another life. What were his answers? (60 ptsA typical reaction time to get your foot on the brake in your car is 0.2 seconds. If you are traveling at a speed of 47 kph, what distance will your car travel during this reaction time? Express your answers in meters.
- While standing at the edge of the roof of a building, a man throws a stone upward with an initial speed of 6.61 m/s. The stone subsequently falls to the ground, which is 17.3 m below the point where the stone leaves his hand. At what speed does the stone impact the ground? Ignore air resistance and use ?=9.81 m/s2 for the acceleration due to gravity. A) Impact speed: _________________________ m/s B) How much time is the stone in the air? elapsed time: ____________ sThe cliff divers at Acapulco, Mexico, jump off a cliff 34.7 m above the ocean. Ignoring air resistance, how fast are the divers going when they hit the water? m/skinematics Show the solution for each problem. What is the final speed of a bus initially moving at 10 m/s which accelerates at a rate of 1.5 m/s˄2 for 4.0 seconds? (Answer: 16 m/s)
- The velocity-time graph that describes the velocity of an object with time is given as in the figure below. if the values of a= 98.5, b=124.6 and c=57, Find the displacement made by the object in the first hour. v(km/h) b. a t(h) 0.5 1.0 1.5 2.0 Select one: A. 118.1 OB. 175.1 OC 398.4 OD. 139.6 OE 142.7 choiceD openvellum.ecollege.com/course.html?courseld%3D17139499&OpenVellumHMACE29)02ACIOTUTU Compute the average acceleration during the time interval t = 0 to t = 10s. Express your answer using two significant figures. The figure (Figure 1) shows the velocity of a solar- powered motorhome (RV) as a function of time. The driver accelerates from a stop sign, cruises for 20 s at a constant speed of 60 km/h, and then brakes to come to a stop 40 s after leaving the stop sign. aav Submit Request Answer Part B Compute the average acceleration during the time interval t = 30s to t = 40s. Express your answer using two significant figures. aay = Figure 1 of 1 (31 of 1 > Submit Request Answer U (km/h) 09 Part C 50 40 Compute the average acceleration during the time interval t = 10s to t = 30s. 30 Express your answer using two significant figures. 20 1. 5 10 15 20 25 30 35 40 (s) 1 - Aav IIA student drives 40 km south in an attempt to get to a science fair competition before realizing he missed the exit. He turns around and drives back north 15 km before arriving. The total time of travel was 0.75 hr. What is his speed? What is his velocity?