Answer:
a) 28.1 m/s
b) 27.2 m
Explanation:
a)
Consider the motion of the marble in downward direction taking down direction as positive
v₀ = initial velocity = 5 m/s
v = final velocity as it hits the ground = ?
a = acceleration = 9.8 m/s²
d = vertical height traveled = 39 m
Using the equation
v² = v₀² + 2 a d
v² = 5² + 2 (9.8) (39)
v = 28.1 m/s
b)
t = time of travel = 1.90 s
y = vertical distance traveled
Using the equation
y = v₀ t + (0.5) a t²
y = (5)(1.90) + (0.5) (9.8) (1.90)²
y = 27.2 m
Answer:
2.to every action there is always an equal & opposite reaction
Answer:
The answer is the third option, the minimum force required to overcome static friction and move an object.
Explanation:
The first choice is talking about an object moving, and anything moving relates to <em>kinetic </em>friction, not static friction. I don't think it's the fourth option because, even with the net force being 0, the object could still be moving (again relating to kinetic friction).
Answer:
Explanation:
From the question we are told that
Mass of pitcher 
Force on pitcher 
Distance traveled 
Coefficient of friction 
a)Generally frictional force is mathematically given by
Generally work done on the pitcher is mathematically given as
b)Generally K.E can be given mathematically as
Therefore
c)Generally the equation for kinetic energy is mathematically represented by
Velocity as subject
