Question
A going from 0 to 30 kilometers per hour in 5 seconds. What car is advertised as (A) km/h (B) 6 km/h 6 is being claimed for this car? D) none of these speed at the end of 5 seconds of a flower pot which has been knocked from a window ledge 200 meters from the ground? (A) 0 m/s m/s (C) 50 m/s D) 10 m/s (E) 125 m/s How far will the flower pot have fallen in 5 seconds? (A) 5 meters (B) 50 meters Someone reaching out an upper story window catches the flower pot and then rows it straight back up the at the rate of 10 meters per second. What in air would be the instantaneous speed of the flower pot at the end of 1 second? How many seconds elapse between the time the person throws up and catches it again? (A) 1 second (B) 2 s seconds (D) none of at is the speed of the flower pot when the person catches it for the second time 27. A pot were dropped from a window ledge 200 meters from the ground and another flower pot were thrown horizontally out the window at the same time, which would hit the ground first? (A) Both would hit the ground at the same time. The thrown flower pot would hit the ground first. (C) The dropped pot would hit the ground first. (D) There is not enough information given to answer this question. Answer the following questions in the space provided. Unless otherwise specified, assume that 10 m/sec. If you wish, you may draw and label diagrams to aid in giving your answers. Where indicated, you must show your calculations to receive full credit for a correct answer. 28. A person wants to hang a picture which weighs 5 newtons from a nail. The string she has only supports a maximum tension of 2.5 newtons. If she ties both ends of the string to the picture and then loops the middle of the string over the nail in the manner indicated in the illustration to the right, will the string break? Why or why not?
Explanation / Answer
According to the chegg guidelines I am allowed to answer only 1 question at a time .
1) Acceleration = Dv/Dt = ( 30 - 0 ) km /hr / ( 5.0 s ) = 6 km/hr/s ===========ANSWER) OPTION D) ==CORRECT.
