Answer:
-2200 N
Explanation:
Here we can use the impulse theorem, which states that the impulse exerted on Sarah (product of force and duration of collision) is equal to Sarah's change in momentum:
where
F is the average force
is the duration of the collision
m is the mass
is the change in velocity
In this problem:
m = 55 kg
Solving the formula, we find the force exerted by the seatbelt on Sarah:
And the negative sign means the direction is opposite to that of Sarah's initial motion.
Answer:
3335400 N/m² or 483.75889 lb/in²
Explanation:
g = Acceleration due to gravity = 9.81 m/s²
A = Area = 1.5 cm²
m = Mass of woman = 51 kg
F = Force = mg
When we divide force by area we get pressure
The pressure exerted on the floor is 3335400 N/m² or 483.75889 lb/in²
There are many many fascinating things about water that make it different than any other chemical substance. For example, it is the only known compound whose solid state is less dense than it's liquid state. It also has hydrogen bonding which gives water many "weird" properties. Many chemistry teachers revolve their entire class around the properties of water.
The force of gravity between two objects is given by:
where
G is the gravitational constant
m1 and m2 are the masses of the two objects
r is their separation
In this problem, the mass of the object is
, while the Earth's mass is
. Their separation is
, therefore the gravitational force exerted on the object is
