AsianaJanae AsianaJanae

23-10-2014
Physics

contestada

Starting from rest, a 4.0-kg body reaches a speed of 8.0 m/a in 20 s. What is te net force acting on the body?

Respuesta :

jackstattershal jackstattershal

23-10-2014

The guy below is wrong!

F=ma
Where force = mass x acceleration

We dont have acceleration, a= change in velocity divided by the time taken.
a = v (final velocity) - u (initial) / t
a us 8-0 (at rest means u was 0) / 20 = 0.4

Using F=ma

F= mass x acceleration
F= 4 x 0.4
F=1.6 N

Answer Link

Otras preguntas

what numbers round up and down to 600

Two fifths of the students in your class are in the band. Of these, one fourth play the saxophone. If there are 30 students in your class, How many students in

eight less than ten times a number is 82

HELP PLEASE A satellite rotates 50 miles above Earth's atmosphere. An astronaut works on the satellite and sees the sun rise over Earth. To the nearest mile, wh

why did so many African Americans migrate north throughout the 1920s? A.) for the milder climate B.)for a chance at a better future C.)to save money D.)to serv

Ginny has two vegetable gardens. in the first garden, Ginny grows tomatoes every 2 years. in the second garden, Ginny grows tomatoes every 3 years.This year, Gi

Name a substance that moves by each mechanism

why did so many African Americans migrate north throughout the 1920s? A.) for the milder climate B.)for a chance at a better future C.)to save money D.)to serv

order from least to greatest 5.04,5.4,5.406,5.064

Predict what might happen to the principle of checks and balances if the supreme court lacked the powers of judicial review.