Hai quả cầu kim loại có bán kính r bằng nhau và bằng 2,5 cm đặt cách nhau 1 m, điện thế của các quả cầu lần lượt là 1200 V và -1200 V. Tính điện tích của mỗi quả cầu.

Agymnast dismounts off the uneven bars in a tuck position with a radius of 0.3m (assume she is a solid sphere) and an angular velocity of 2rev/s. during the dismount she stretches out into the straight position, with a length of 1.5m, (assume she is a uniform rod through the center) for her landing. the gymnast has a mass of 50kg. what is her angular velocity in the straight position?

According to newton’s first law of motion, which force is expected to cause a body to accelerate?

1.what is where an object is located 2. what is how fast an objects speed is changing 3. what is how fast an object is moving