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, 21.06.2019 18:00
According to the law of conservation of mass, in a chemical reaction the total starting mass of all the reactants equal the total final mass of all the products. true or false?
Answers: 1
Physics, 22.06.2019 12:30
Matter is needed to transfer thermal energy bya. conductionb. convectionc. radiation d. both a & b.
Answers: 1
Physics, 22.06.2019 14:00
An object resting on a table weighs 100 n. with what force is the object pushing on the table? with what force is the table pushing on the object? explain how you got your answer.
Answers: 1
Physics, 22.06.2019 16:00
The electric field direction is defined by the direction of the force felt by (select one of the following answers): 1. a negative charge. 2. a positive charge. 3. both positive and negative charges.
Answers: 2
A person driving a car suddenly applies the brakes. The car takes 4 s to come to rest while travelin...
Chemistry, 12.10.2020 01:01
Mathematics, 12.10.2020 01:01
English, 12.10.2020 01:01
Mathematics, 12.10.2020 01:01
Biology, 12.10.2020 01:01
History, 12.10.2020 01:01
Health, 12.10.2020 01:01
Geography, 12.10.2020 01:01
Biology, 12.10.2020 01:01
Mathematics, 12.10.2020 01:01
Mathematics, 12.10.2020 01:01
Computers and Technology, 12.10.2020 01:01