In order to form a real image using a concave mirror, the object must be placed beyond the center of curvature of the mirror. Therefore, the object must be further from the mirror than the focal point. The image that will form will be real, but it will also be inverted and its magnification will be less than 1, meaning it will be smaller than the actual object.
Explanation:
Minimum of aerobic activity 150 minutes, or a mix of moderates and intensive exercise 75 minutes of vigorous aerobic activity a week. We can extend this practice throughout the week with the instructions. Mild aerobic workouts might include practices like quick strolling or swimming, while activity like running can include strong aerobic activity.
Answer:
V=15.3 m/s
Explanation:
To solve this problem, we have to use the energy conservation theorem:
![U_e+K_i+U_{gi}+W_{friction}=K_f+U_{gf}](https://tex.z-dn.net/?f=U_e%2BK_i%2BU_%7Bgi%7D%2BW_%7Bfriction%7D%3DK_f%2BU_%7Bgf%7D)
the elastic potencial energy is given by:
![U_e=\frac{1}{2}*k*x^2\\U_e=\frac{1}{2}*1100N/m*(4m)^2\\U_e=8800J](https://tex.z-dn.net/?f=U_e%3D%5Cfrac%7B1%7D%7B2%7D%2Ak%2Ax%5E2%5C%5CU_e%3D%5Cfrac%7B1%7D%7B2%7D%2A1100N%2Fm%2A%284m%29%5E2%5C%5CU_e%3D8800J)
The work is defined as:
![W_{friction}=F_f*d*cos(\theta)\\W_{friction}=40N*2.5m*cos(180)\\W_{friction}=-100J](https://tex.z-dn.net/?f=W_%7Bfriction%7D%3DF_f%2Ad%2Acos%28%5Ctheta%29%5C%5CW_%7Bfriction%7D%3D40N%2A2.5m%2Acos%28180%29%5C%5CW_%7Bfriction%7D%3D-100J)
this work is negative because is opposite to the movement.
The gravitational potencial energy at 2.5 m aboves is given by:
![U_{gf}=m*g*h\\U_{gf}=60kg*9.8*2.5\\U_{gf}=1470J](https://tex.z-dn.net/?f=U_%7Bgf%7D%3Dm%2Ag%2Ah%5C%5CU_%7Bgf%7D%3D60kg%2A9.8%2A2.5%5C%5CU_%7Bgf%7D%3D1470J)
the gravitational potential energy at the ground and the kinetic energy at the begining are 0.
![8800J+0+0+-100J=\frac{1}{2}*62kg*v^2+1470J\\v=\sqrt{\frac{2(8800J-100J-1470J)}{62kg}}\\v=15.3m/s](https://tex.z-dn.net/?f=8800J%2B0%2B0%2B-100J%3D%5Cfrac%7B1%7D%7B2%7D%2A62kg%2Av%5E2%2B1470J%5C%5Cv%3D%5Csqrt%7B%5Cfrac%7B2%288800J-100J-1470J%29%7D%7B62kg%7D%7D%5C%5Cv%3D15.3m%2Fs)
The last one (words that have the same sound but different spellings and meanings)