Một chất điểm chuyển động trên đường tròn bán kính 5m từ trạng thái đứng yên, nhanh dần đều với gia tốc góc bằng 2 rad/s2. Sau 20 giây vật có vận tốc m/s và gia tốc hướng tâm m/s2

Curious carl calculated the density of a cube to be 4.50 g/cm3. what is the density of the cube in g/l?

You've already seen the value of 9.8 in this lesson. what's this value called? what quantity does it represent?

Astone is thrown with a speed v0 and returns to earth, as the drawing shows. ignore friction and air resistance, and consider the initial and final locations of the stone. which one of the following correctly describes the change δpe in the gravitational potential energy and the change δke in the kinetic energy of the stone as it moves from its initial to its final location? options a.δpe = 0 j and δke = 0 j b.δpe is positive and δke is negative c.δpe = 0 j and δke is positive d.δpe is negative and δke is positive e.δpe = 0 j and δke is negative