In order to create a charged object you need to transfer electrons either away or to the object by induction, conduction, or friction
Induction is without contact(like bringing a charged object to a electroscope charges the leaves at the bottom)
Conduction is with contact(like the previous answer, wore touching transfers the charge from a source to the object)
Friction(rubbing a balloon on wool)
Kinetic energy = mass time squared speed divided by 2
W=mv^2/2 = 50*10*10/2 = 2500 J
1.022 km/s
Hope this helps~~~~~~~~
To calculate the acceleration of the truck, we use the equation of motion

Here, v is final velocity of the truck, u is initial velocity of truck, a is acceleration of the truck and t is time taken.
Given, u = 6 m/s, v = 14 m/s and t = 4 s.
Substituting these values in above equation, we get
.
Thus, the truck acceleration is 
Answer:

Explanation:
Given:
length of the stick, 
position of holding the stick that acts as a hinge, 
mass of the object, 
position of hanging the mass on the meter stick, 
new position of hanging the mass, 
<u>Now the torque in the initial position:</u>

where:
acceleration due to gravity


Now when the mass is at the new position:


