S s. S s abbs s sbsbs z sbs
Answer:
The speed is and the direction is heading north.
Explanation:
In collisions the force exerted by the objects that collide is higher enough than the external forces that we can neglect that external forces, with that assumption we can use the conservation fo momentum law that states, final total momentum (pf) is equal initial total momentum (pi) if there’re not external forces or they are small enough to be neglected. Mathematically:
The total momentum is the sum of the momentum of each of the bodies we're dealing, in our case the moment of each car, then:
with pn the momentum of the 1000kg car heading north and ps the 800kg car heading south. Momentum is defined as mass times velocity, then:
(1)
It's important to note that when we talk about momentum and velocity direction matters, so we're are going to choose a system of reference where quantities pointing north are positive and pointing south are negative. So, the initial velocity of 1000 kg car is vni=5 m/s, initial velocity of 800 kg car is vsi=-4 m/s and the final velocity of 1000 kg car is vnf=-1 m/s. Now we can solve (1) for vsf and use the values we already have:
Because the sign is positive the direction is to heading north.
The formula applied in diffraction gratings is:
dsin(θ) = nλ
where d is the distance between two adjacent openings in the grating, θ is the angle between two minima or maxima of light, n is the order of the maxima or minima formed and λ is the wavelength of the light being diffracted.
Answer:
the Earth magnetic field in that region is about 89.09 T
Explanation:
If the magnetic field has an inclination of , and its horizontal component is 17 microTesla, then we can calculate the magnitude of the full magnetic field via the cosine function. Notice that the decomposition of a vector in horizontal and perpendicular components originates a right angle triangle where the vector is the hypotenuse of the triangle.
Answer: v2 = -50.8m/s
Therefore, the speed of the baseball is 50.8m/s away from the bat. (Reverse direction)
Explanation:
Using the law of conservation of momentum:
The impulse of the bat = change in momentum of the baseball
Ft = ∆M
Ft = m1v1 - m2v2
Since m1 = m2 = m (the mass remains unchanged)
Ft = m(v1 - v2) .....1
Given:
Force F = 8900N
Mass m = 0.145kg
time t = 1.3 × 10^-3 s
Initial velocity v1 = 29m/s
Substituting into eqn 1
8900(1.3×10^-3) = 0.145(29-v2)
29-v2 = 79.79
v2 = 29 - 79.79 = -50.8m/s
v2 = -50.8m/s
Therefore, the speed of the baseball is 50.8m/s away from the bat.