Answer:
Differences between freefall and weightlessness are as follows:
<h3>
<u>Freefall</u></h3>
- When a body falls only under the influence of gravity, it is called free fall.
- Freefall is not possible in absence of gravity.
- A body falling in a vacuum is an example of free fall.
<h3>
<u>Weightlessness</u></h3>
- Weightlessness is a condition at which the apparent weight of body becomes zero.
- Weightlessness is possible in absence of gravity.
- A man in a free falling lift is an example of weightlessness.
Hope this helps....
Good luck on your assignment....
Answer:
Explanation:
Force = mass x acceleration
Force is always vector and acceleration also vector but the mass is a saclar quanity.
here, the direction of force vector is same as the direction of acceleration vector but the magnitude of force depends on the magnitude of mass of the body.
Is mass is more, force is also more.
Thus, the mass is like an indicator of the magnitude of force.
pls follow me
Explanation:
A projectile is an object upon which the only force is gravity. The horizontal motion of the projectile is the result of the tendency of any object in motion to remain in motion at constant velocity. Due to the absence of horizontal forces, a projectile remains in motion with a constant horizontal velocity.
Answer:
750W
Explanation:
Given parameters:
Weight = 1 x 10³N = 1000N
Distance = 1.5m
Time = 2s
Unknown:
Power = ?
Solution:
Power is the rate at which work is done
Work is the force applied on a body to move it through a particular distance
Work = force x distance
Power = 
Now, work = 1000 x 1.5 = 1500J
So;
Power = 
= 750W
<span>A) The effort force is always smaller than the force needed without the machine.
It is because some of the work (by force) is lost during the conversion
Hope this helps!</span>
