Protons and neutrons. Explanation:
Protons are massive, positively charged
nuclear particles.
Answer:
what is the question please?
Answer:
A. positively charged object and a negatively charged object.
A) The friction force while the box is stationary is (the coefficient of static friction)*(the normal force). In this case, the normal force is equal to the gravitational force, or the weight. To move the box, we need a minimum horizontal force that is equal to the friction force. The weight is (500 kg)*(9.81 m/s^2)= 4905 N. So, (0.45)*(4905 N) = 2207.25 N.
b) The acceleration will be the horizontal force - the kinetic friction force (since they act in opposite directions) divided by the mass. Kinetic friction force = (coefficient of kinetic friction)*(normal force or weight).
F(net) = (2207.25 N)-(0.30)(4905 N) = 735.75 N
a = (735.75 N)/(500kg)= 1.4715 m/s^2
The maximum height reached by the ball thrown by the boy is determined as 12.5 m.
<h3>
Angle of the projection</h3>
The angle of projection of the ball is calculated as follows;
R = u²sin2θ/g
- at maximum range, θ = 45 degrees
50 = u²/9.8
u² = 50 x 9.8
u² = 490
u = 22.14 m/s
<h3>Maximum height of the ball</h3>
H = u²sin²θ/2g
H = (22.14² x (sin45)²)/(2 x 9.8)
H = 12.5 m
Thus, the maximum height reached by the ball thrown by the boy is determined as 12.5 m.
Learn more about maximum height here: brainly.com/question/12446886
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