Answer:
Antarctica and Australia were one landmass millions of years ago
Explanation:
Thats the answer I'm very sure of it
Answer:
See the explanation below
Explanation:
After the mass is pulled, you have all three types of energy; potential, kinetic and elastic. Elastic as it has extension of the spring, potential energy as the mass is one meter above the ground level, and kinetic energy as the mass is in motion.
The following are the equations for calculating the different energies.
![E_{elas}=0.5*k*x^2\\where:\\k = spring constant [N/m]\\x = distance [m]\\\\E_{pot} =m*g*h\\where:\\m = mass [kg]\\g = gravity = 9.81[m/s^2]\\h = elevation [m]\\\\E_{k}=0.5*m*v^2\\where:\\m= mass [kg]\\v = velocity [m/s]](https://tex.z-dn.net/?f=E_%7Belas%7D%3D0.5%2Ak%2Ax%5E2%5C%5Cwhere%3A%5C%5Ck%20%3D%20spring%20constant%20%5BN%2Fm%5D%5C%5Cx%20%3D%20distance%20%5Bm%5D%5C%5C%5C%5CE_%7Bpot%7D%20%3Dm%2Ag%2Ah%5C%5Cwhere%3A%5C%5Cm%20%3D%20mass%20%5Bkg%5D%5C%5Cg%20%3D%20gravity%20%3D%209.81%5Bm%2Fs%5E2%5D%5C%5Ch%20%3D%20elevation%20%5Bm%5D%5C%5C%5C%5CE_%7Bk%7D%3D0.5%2Am%2Av%5E2%5C%5Cwhere%3A%5C%5Cm%3D%20mass%20%5Bkg%5D%5C%5Cv%20%3D%20velocity%20%5Bm%2Fs%5D)
Answer:
25N
Explanation:
formula=> Frictional force= coefficient of friction x normal reaction
normal reaction is mass x gravity(10N/kg)
so Frictional force= 0.5x5x10
=25N
but that is the Frictional force not the constant force
to get the constant force, subtract the Frictional force from the weight of the block
weight= mass x gravity
= 5x10
= 50N
50N-25N
=25N