: Ném một vật lên cao với vận tốc ban đầu v0 = 15(m/s) theo phương hợp với phương ngang một góc =30. Bỏ qua sức cản khơng khí lấy g = 9,8(m/s2). Bán kính cong của quỹ đạo tại vị trí cao nhất của vật là:

Two 1.20-m nonconducting wires meet at a right angle. one segment carries + 2.50 µc of charge distributed uniformly along its length, and the other carries - 2.50 µc distributed uniformly along it, as shown in fig. 21.50. ( a. find the magnitude and direction of the electric field these wires produce at point p, which is 60.0 cm from each wire. ( b. if an electron is released at p, what are the magnitude and direction of the net force that these wires exert on it?

It's a snowy day and you're pulling a friend along a level road on a sled. you've both been taking physics, so she asks what you think the coefficient of friction between the sled and the snow is. you've been walking at a steady 1.5m/s, and the rope pulls up on the sled at a 32 ∘ angle. you estimate that the mass of the sled, with your friend on it, is 65 kg and that you're pulling with a force of 80 n .

What are the dimensions of the cross section that passes through the points a, f, g, and d?