Answer:
300 N
Explanation:
We have three forces acting on the object:
- W = 1500 N, downward: the weight of the object
- F1 = 1200 N, upward: the force exerted by the first man
- F2, upward: the force exerted by the friend
In order to lift the object, the sum of the two forces F1 and F2 must be at least equal to the weight of the object W. Therefore we can write
And from this equation, we can find the magnitude of F2:
This is a derived unit. It's a combination of the units for mass, length, and time.
Answer:
a)
346.67 N/C, downward
b)
1.3 m
Explanation:
(a)
q = magnitude of charge on the particle = 1.95 x 10⁻⁹ C
r = distance of location from the charged particle = 0.225 m
E = magnitude of electric field at the location
Magnitude of electric field at the location is given as
Inserting the values
E = 346.67 N/C
a negative charge produce electric field towards itself.
Direction : downward
(b)
E = magnitude of electric field at the location = 10.5 N/C
r = distance of location from the charged particle = ?
q = magnitude of charge on the particle = 1.95 x 10⁻⁹ C
Magnitude of electric field at the location is given as
Inserting the values
r = 1.3 m
Answer:
M V = m v conservation of momentum (Caps-cannon Small-projectile)
V = m / M * V = 2 / 2000 * 200 m/s = .2 m/s recoil velocity of cannon
KE = 1/2 M V^2 = 2000 / 2 kg * (.2 m/s)^2 = 40 kg m^2/s^2 = 40 J
Initial state the pressure and volume are
P = 1 bar
V = 1 litre
Now the process equation is given as
PV = constant
So now the pressure is increased to
P = 4 bar
so volume must decrease by 4 times
so final volume is
V = 0.25 litre
Now the pressure is constant and volume again increased to V = 1 litre
Now in final step the volume will become constant and again pressure will become P = 1 bar
so this is a cyclic process and figure is attached at following