Hi!!solve this prob for me,,plesszzz!!
A boy pushes a ball of mass 3 Kg from rest to reach a velocity of 6 ms-1 in 2s. What is the force applied on the ball?
what's confusing me is, what type of the force that acting on the ball and how to solve the problem. i already know its answer...
2006-10-27 16:46:27 · 5 answers · asked by Maddie 7 in Science & Mathematics ➔ Physics
but the answer is 6N....
2006-10-27 16:56:54 · update #1
well you use Newton's F=ma.
a force F is required to cause an acceleration a, in an object of some mass, m.
a=6ms-1/2s=3ms-2
force=3x3=9N
2006-10-27 16:49:46 · answer #1 · answered by Anonymous · 0⤊ 0⤋
Firstly, determine the acceleration that ball undergoes. Using the formula [ a = v/t ] where a stands for acceleration, v stands for velocity and t stands for time, acceleration is 6/2 which is 3ms-2.
Then, using the formula F= ma, where F stands for force, m stands for mass and a stands for acceleration, F is 3 X 3, which is 9N, where the unit is newtons.
The force is exerted by the ball, in order for the ball to move.
2006-10-27 16:51:59 · answer #2 · answered by lee-wlcj 2 · 0⤊ 1⤋
Hint: Use the first eqn of motion final velocity = initial velocity + at You will see that you need to solve for the time before you can find the final velocity (initial velocity is zero because the apple was at rest when it was hanging from the tree, a = 9.8 m/s^2) So to find time, use the 2nd eqn of motion: d = initial vel x t + 1/2a(t^2) d= 1/2g(t^2) because initial vel is zero Solve for time, and plug it into the first eqn good luck!
2016-03-28 09:47:02 · answer #3 · answered by Anonymous · 0⤊ 0⤋
V = V0 + at
6 m/sec = a(2 sec)
a = 3 m/sec^2
F = ma
F = (3 kg)(3 m/sec^2)
F = 9 kg-m/sec^2
F = 9 N
2006-10-27 17:14:31 · answer #4 · answered by Helmut 7 · 0⤊ 0⤋
If you already know the answer why do you want people to solve the problom for you? let me guess Math- science homework?
2006-10-27 16:49:03 · answer #5 · answered by Gabriela 2 · 0⤊ 1⤋