Similar fossils found on different continents helped geologists determine how the continents used to be connected. Mountain belts marked the boundaries of moving plates, which showed in which direction the different continents drifted. Extrapolating from this information, scientists had a rough idea of how the continents were arranged eons ago.
The velocity of the combined mass after the collision is 0.84 ms-1.
<u>Explanation:</u>
According to law of conservation of momentum, the change in momentum before collision will be equal to the change in momentum of the objects after collision in isolated system.
But as it is perfectly inelastic collision in the present case, the final momentum will be based on the product of total mass of both the object with the velocity with which the collision occurred. This form is attained from the law of conservation of momentum as shown below:
So as law of conservation of momentum,
Here 
= 3 kg and 
= 2 kg are the masses of objects 1 and 2, 
= 1.4 m/s and 
= 0 are the initial velocities of object 1 and object 2, 
and 
are the final velocities of the objects.
So after collision, object 1 get sticked to object 2 and move together with equal velocity = = 
. Thus the above equation will become,
So the final velocity is
Thus,
= 0.84 ms-1.
Answer:
The point through which the Whole mass of the body acts, irrespective of the position of the body, is known as centre of gravity (briefly written as c.g.). ... Mass affects the centre of gravity of the object.
Explanation:
<h2>
Answer: C) He could have thrown the bag of money sideways, creating a horizontal reaction force on himself.</h2>
Explanation:
According to Newton's third law of motion, when two bodies interact between them, appear equal forces and opposite senses in each of them.
To understand it better:
Each time a body or object exerts a force on a second body or object, it (the second body) will exert a force of equal magnitude and direction but in the opposite direction on the first.
So, if the rich man had pushed the bag of money horizontally opposite of where he was, he could have saved himself.
