Một ô tô đang chạy với vận tóc không đổi 25m/s trên một quãng đường thẳng thì người lái xe hãm phanh lại cho ô tô chuyển động chậm dần đều sau khi chạy thêm đc 80m thì vận tốc ô tô còn 15km/s a) tìm gia tốc của ô tô trong 80m đoạn đường này
b) nếu xe tiếp tục chuyển động như vậy sau bao lâu xe dừng lại?
c) tìm quãng đường trong giây cuối cùng ? Còn

If a textbook weighs 37.2 n on venus, and the book has a mass of 4.4 kg, what is the strength of gravity on venus? 8.9 m/s28.9 m/si don't have enough information,9.8 m/s2

Moon effect. some people believe that the moon controls their activities. if the moon moves from being directly on the opposite side of earth from you to being directly overhead, by what percentage does (a) the moon's gravitational pull on you increase and (b) your weight (as measured on a scale) decrease? assume that the earth–moon (center-to-center) distance is 3.82 × 10^8 m, earth's radius is 6.37 × 10^6 m, moon's mass is 7.36 × 10^22 kg, and earth's mass is 5.98 × 10^24 kg.

Unpolarized light falls on two polarizer sheets whose transmission axes are at right angles. a third polarizer is placed between the first two so that its axis makes a 52-degree angle with the axis of the first polarizer. a) what fraction of the incident light intensity is transmitted through the first polaroid? b) what fraction of the incident light intensity is transmitted through the second polaroid? c) what is the angle of polarization of the light that enters the third polaroid? d) what fraction of the incident light intensity is transmitted through the third polaroid. e) what happens if the middle polaroid is removed?