A person driving a car suddenly applies the brakes. The car takes 4 s to come to rest while traveling 20 m at constant acceleration. Can the speed of the car immediately before the brakes were applied be determined without first determining the car's acceleration? )
A. Yes, by dividing the distance (20 m) by the time (4 s).
B. Yes, by determining the average speed while braking and doubling it.
C. No, because the acceleration is needed to use standard equations such as Ax= v. t + 1/2 at
D No, because the fundamental relationship that defines velocity contains acceleration.
Answers: 1
Physics, 22.06.2019 11:50
The mass of the sun is 1.99Ă—1030kg and its distance to the earth is 1.50Ă—1011m. what is the gravitational force of the sun on the earth?
Answers: 3
Physics, 22.06.2019 12:20
Which of the following situations is impossible? a) an object has velocity directed east and acceleration directed east. b) an object has zero velocity but non-zero acceleration. c) an object has constant non-zero velocity and changing acceleration. d) an object has velocity directed east and acceleration directed west. e) an object has constant non-zero acceleration and changing velocity.
Answers: 2
Physics, 22.06.2019 16:40
Panel bc in fig. p2.76 is semi-circular, with the 3 meter radius and horizontal straight edge through point b. compute (a) the hydrostatic force of the water on the panel, (b) its center of pressure, and (c) the moment of this force about point b. assume atmospheric pressure on the dry side of the panel
Answers: 3
A person driving a car suddenly applies the brakes. The car takes 4 s to come to rest while travelin...
Arts, 28.09.2020 01:01
Mathematics, 28.09.2020 01:01
Mathematics, 28.09.2020 01:01
English, 28.09.2020 01:01
Chemistry, 28.09.2020 01:01
History, 28.09.2020 01:01
Mathematics, 28.09.2020 01:01
Social Studies, 28.09.2020 01:01
Mathematics, 28.09.2020 01:01