Answer:
a
The speed of the quarterback backward is 
b
Known are
Unknown
Explanation:
From the question we are told that
The mass of the quarterback is 
The mass of the ball is 
The speed of the ball is 
The law of momentum conservation can be mathematically represented as
Now at initial both ball and quarterback are at rest and the negative sign signify that the quarterback moved backwards after throwing the ball
So
=> 
substituting values
I’m almost 100 percent sure it’s the first one
Electrical > light,sound and thermal
<span>Density is a value for
mass, such as kg, divided by a value for volume, such as m^3. Density is a
physical property of a substance that represents the mass of that substance per
unit volume. The mass of the salty water is calculated as follows:
Mass = 1.166 g/mL ( 2000 mL ) = 2332 g of salty water</span>
Answer:
Explanation:
Given that,
The mass of a bag of acorns, m = 8.5 kg
The force acting on the bag = 80 N
The force of friction = 32 N
We need to find the acceleration of the bag of acorns.
Net force acting on it is = 80 N - 32 N
= 48 N
Let a be the acceleration of the bag of acorns. So,
F = ma
So, the acceleration of the bag of acorns is 
.
