As the box is moving with a constant velocity, the two forces acting on the box are canceling each other.
Then friction force = 80 Newtons but in the opposite direction.
Friction force = Mu * Normal force exerted by ground = Mu * weight of box So we find Mu. Mu = coefficient of friction between box and horizontal surface = Force of friction / weight = 80 / 50 * 9.81 = 0.163
When an identical box is placed on top, the force of friction is ** = Mu * total weight = 0.163 * (50+50) * 9.81 = 159.9 Newtons**
When an identical box is stacked on the 50 kg box, the force of friction increases due to the increase in the normal force, leading to a greater maximum potential friction force. The total weight on the lower box becomes 100 kg, raising the normal force to 981 N. Since the normal force is directly related to friction, we conclude that the force of friction will increase in this scenario.
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Penjelasan:1. Respons orang Yahudi terhadap dakwah Nabi Muhammad saw. di MadinahJawab: Sebagian kecil ada yang bersikap netral, tetapi mayoritas menolak, menentang, bahkan berkhianat terhadap perjanjian dengan Nabi Muhammad saw.2. Pertempuran paling berat yang dialami kaum muslimin di MadinahJawab: Pertempuran Uhud, karena banyak sahabat gugur dan kaum muslimin mengalami kekalahan akibat sebagian pasukan pemanah meninggalkan posisinya.3. Ayat Al-Qur’an tentang peristiwa bertahan di Bukit UhudJawab: Terdapat dalam QS. Ali Imran ayat 152 yang menceritakan sebagian pasukan tidak taat sehingga kaum muslimin menderita kekalahan.Bantu kasih likenya ya, apabila jawaban ini membantu. Terimakasih