This is a speed/time graph.
The slope of the graph at each point is the time rate of change of speed
at that point, and THAT's the definition of the magnitude of acceleration.
The slope of the curve is zero at both ' A ' and ' B ', so acceleration is
zero at both of those points.
That seems to be exactly what choice-c says.
<u>Note: I'm assuming the data 77.3 is the mass of the crate.</u>
Answer:
Explanation:
The coefficient of static friction, called \mu_s is the ratio between the force needed to start moving an object above a rough surface (Fr), and the normal force the surface exerts on the object (N).
The normal force is numerical equivalent to the weight of the body if no other external forces are acting.
The mass of the crate is m=77.3 Kg, thus its weight and normal force is:
Now we calculate the coefficient:
the correct answer is C hope this helps a little
Answer:
e. a
Explanation:
im not sure if this is right