Tác dụng lên một bánh xe bán kính R = 0,5m và có mômen quán tính I = 20kg. m2 , một lực

tiếp tuyến với vành bánh Ft = 100N. Tìm:
a. Gia tốc của bánh xe?
b. Vận tốc dài của một điểm trên vành bánh sau khi tác dụng lực 10 giây biết rằng lúc đầu bánh xe
đứng yên?

Which of the following represents an upside-down image?

Iwill give 30 points to whoever answers ! what is the formula for actual mechanical advantage and ideal mechanical advantage?

Samir watches a 100-minute movie on his spaceship. maria's spaceshipe flies in the same direction as samir's spaceship but she observes his move to last 125 minutes and his spaceship to be 40 m long. how long does samir observe his own spaceship to be? according to an observer on earth, planet x is stationary. maria and samir depart earth on their spaceships at the same time, each flying at 0.5c. maria flies toward planet x and samir flies in the opposite direction. according to maria, her voyage to planet x takes 9 years. how many years does marias voyage take according to samir?