Answer:
1.77 N
Explanation:
Mass of bullet m = 1.7 x 10⁻³ kg
velocity v = 380 m /s .
Momentum of one bullet
= 1.7 x 10⁻³ x 380
= 646 x 10⁻³ kg m/s
momentum of 165 bullets
= 165 x 646 x 10⁻³ kg m/s
= 106.59 kg m/s
Final momentum after bouncing
= 0
change in momentum
= 106.59 - 0
= 106.59 kg m/s
This change occurs in one minute
so rate of change in momentum
= 106.59 / 60 kg m/s per second
= 1.77 kg m/s per second
rate of change in momentum = force
This is force on superman's chest
Force required = 1.77 N .
Answer:
Explanation:
Given data
mass of copper m=4.85 kg
charge of electron qe= -1.6×10⁻¹⁹C
To find
Number of electron n must be removed
Solution
Equate the magnitude of electric force Fe of repulsion between two two spheres to the magnitude of gravitational force of attraction between them
So
where q is charge of each sphere which is equal to number n of removed electrons multiplied by each charge qe
So
Answer:
The force that the book exerts down on the table is equal to the force the table exerts upward.
Explanation:
I am 100% positive. That results in balanced forces which is why it does not move. If you did want it to move, you would apply unbalanced forces.
