Answer:
KE = 1/2 M v^2 kinetic energy of projectile
KE = 1/2 * 20 * (54 m/s)^2 = work done on projectile
W = 10 * 54^2 = work done on projectile
W = 29,160 J
Answer:
(a) The velocity is 12 m/s.
(b) The average force is 18 000N.
Explanation:
(a) The principle of conservation of momentum,
total momentum before = total momentum after
- = +
But, the initial velocities equal zero,
= = 0
So that,
0 = +
Substituting the values of variables given in the question,
0 = 1 × + 0.02 × 600
0 = + 12
= - 12 m/s
Thus, the velocity is 12 m/s.
(b) F = ma
From the third equation of motion,
= + 2as
a = -
=
= -900, 000 m/s^2
a = 900, 000 m/s^2
The acceleration is 900 Km/s^2.
F = 0.02 × 900000
= 18 000 N
Thus, the average force is 18 000N.
Answer:
1) d
2) 5 m/s
3) 100
Explanation:
The equation of position x for a constant acceleration a and an initial velocity v₀, initial position x₀, time t is:
(i)
The equation for velocity v and a constant acceleration a is:
(ii)
1) Solve equation (ii) for acceleration a and plug the result in equation (i)
(iii)
(iv)
Simplify equation (iv) and use the given values v = 0, x₀ = 0:
(v)
2) Given v₀= 3m/s, a=0.2m/s², t=10 s. Using equation (ii) to get the final velocity v:
3) Given v₀=0m/s, t₁=10s, t₂=1s and x₀=0. Looking for factor f = x(t₁)/x(t₂) using equation(i) to calculate x(t₁) and x(t₂):
We should really talk about the energy of a photon.
Photon Energy= h x c/ wavelength
where h is Planck's constant and c is the speed of light
h = 6.63 x 10^-34
c =3x 10^8
Energy = 2.37 x 10^-21
Answer:
<h2>75 cm³</h2>
Explanation:
The volume of a substance when given the density and mass can be found by using the formula
From the question we have
We have the final answer as
<h3>75 cm³</h3>
Hope this helps you