Answer:
1.3 m
Explanation:
The work done in lifting the backpack is equal to the change in gravitational potential energy of the backpack, so:
where
W = 100 N is the weight of the backpack
is the change in heigth of the object
In this problem, we know that
so we can re-arrange the equation to find the change in height of the backpack:
An order-of-magnitude estimate of the volume of this balloon in cm3
IS 4 as it will be in few 10000cm^3 in volume 25*25*25
Answer:
Force, F = 77 N
Explanation:
A child in a wagon seem to fall backward when you give the wagon a sharp pull forward. It is due to Newton's third law of motion. The forward pull on wagon is called action force and the backward force is called reaction force. These two forces are equal in magnitude but they acts in opposite direction.
We need to calculate the force is needed to accelerate a sled. It can be calculated using the formula as :
F = m × a
Where
m = mass = 55 kg
a = acceleration = 1.4 m/s²
F = 77 N
So, the force needed to accelerate a sled is 77 N. Hence, this is the required solution.
Another pangolin is needed.