Answer:
I = (5.71 i ^ + 6.99j ^) N s
Explanation:
The concept of impulse is very useful for problems where shocks occur, the impulse is equal to the change of moment of the system
I = Δp = m -m v₀
Let's fix an xy coordinate system, where y is vertical and we decompose the velocities
Initial
sin (-40) = / vo
cos (-40) = v₀ₓ / Vo
= 17.0 sin (-40)
= -10.93 m / s
Vox = 17 cos (-40)
Vox = 13.02 m / s
Final
sin 30 = / vf
cos 30 = / Vf
= 48.0 sin30
= 24.0 m / s
= 48 cos 30
= 41.57 m / s
Let's calculate the momentum on each axis
X axis
Iₓ = m -m
Iₓ = 0.200 (41.57 - 13.02)
Iₓ = 5.71 N s
Axis y
= m - m
= 0.2000 (24 - (-10.93))
= 6.99 N s
I = (5.71 i ^ + 6.99j ^) n s
A non-contact force is a force which acts on an object without coming physically in contact with it. In contrast a contact force is a force which acts on an object coming physically in contact with it. ...
In air, you'd call it air resistance, pilots call it drag. In water, some call it
water resistance, or just plain drag.
Whatever it's called, it's the friction between the object and the fluid, plus
the force needed to push the fluid out of the way to let the object get through.
We know that
• The mass of the elevator is 5000 kg.
Let's draw a free-body diagram.
As you can observe, there are just two forces involved, the weight of the elevator and the tension force. Let's use Newton's Second Law.
But, W = mg = 5000kg*9.8m/s^2 = 49,000 N, and m = 5000 kg, a = 0 (because the speed is constant).
<h2>Therefore, the tension in the cable is 49,000 N.</h2>
Answer:
Explanation:
mass of alpha particle, m = 4 u = 4 x 1.67 x 10^-27 kg
charge, q = 2 e = 3.2 x 10^-19 C
radius, r = 3.45 cm
Magnetic field, B = 1.67 T
(a) let v be the speed
v = 2760000 m/s
(b) Let T be the period of revolution
T = 7.85 x 10^-8 seconds
(c) Kinetic energy, K =0.5 x mv²
K = 0.5 x 4 x 1.67 x 10^-27 x 2760000 x 2760000
K = 6.36 x 10^-15 J
(d) kinetic energy, K = e V
where, V is the potential difference
6.36 x 10^-15 = 1.6 x 10^-19 x V
V = 39754.35 V