Answer:
Explanation:
the solution is given in the attached pictures
Answer: The acceleration for the shuttle is 13 800m/s^2.
Explanation:
The answer is required is si unit which is m/s^2.
The first step is to convert to velocity to m/s, 1km=1000m therefore we have to multiply by 1000
5km/s=5000m/s
11.9km/s=11900m/s.
The formula for the acceleration is a=dv/t
a=11900-5000/0.5
a=13 800m/s
Answer:
1/2mv² = ke²
Explanation:
Let's suppose the material in question is a spring with spring constant k, mass m and position k, the kinetic energy possessed by the string will be;
K.E = 1/2mass×velocity² i.e 1/2mv²
Its elastic potential energy will be the work done on the spring when stretched which is equal to 1/2kx²
E.P = 1/2kx²
The equation describing the case where the kinetic energy is twice the elastic potential energy will be;
K.E = 2EP... 1)
Substituting the KE and EP formula into (1), we have;
1/2mv² = 2(1/2ke²)
1/2mv² = ke² which gives the required equation
<span>A lubricant such as oil, grease, graphite powder can reduce the friction between two surfaces. Or using metal balls to space them and reduce the contact surface area as used in ball bearings.</span>
