Answer:
It will increase
Explanation:
The kinetic energy is the energy possessed by a moving object and is given by:
KE = 
where m = mass of the object and v = velocity of the object.
It does means that the more the mass of an object in motion, the more the kinetic energy of the object if there are no opposing force such as friction. Also, the more the kinetic energy of the object, the more the speed of that object.
<em>Hence, as the weight of the cart increases by addition of groceries, the kinetic energy increases and the speed also increases as it moves along the frictionless surface.</em>
A motorboat accelerates uniformly from a velocity of 6.5m/s
to the west to a velocity of 1.5m/s to the west. if its accelerate was 2.7m/s2
to the east ,
how far did it travel during the accelration? Give your
answer in units of kilometers per hour/sec. To find the acceleration of the car
we have to
<span>
1. First determine
the suitable formula for this word problem.
Which is a. A=vf-vi/t</span>
which will be
Given are: Vi= 6.5 m/s Vf= 1.5 m/s a= 2.7 m/sec2 t=1.85s
Solution:
<span>
x = v0t + ½at2</span>
<span>x = <span>16.645375 m </span></span>
Answer:
and 
Or
and 
Explanation:
We are given that
Force between two charges=0.036 N=
Distance between two charges, r=2cm=
m
1m=100cm
Sum of two charges=
Let one charge=
We know that
Electric force between two charges
Where 
Using the formula
Using the formula
and 
Hence, two charges are
and
Or
and
Answer:
80 m tall
Explanation:
*** EDITED *** (I left out the '1/2' in the equation....D'Oh!)
It was descending 4 seconds ...because it landed 20 m away (at 5 m/s ...so 4 seconds)
displacement =<u> 1/2</u> a t^2
= 1/2 * 10 ( 4)^2 = 80 m tall
