Vật khối lượng m = 500g, chuyển động trên mặt phẳng nghiêng (có góc nghiêng   450 so với phương ngang) dưới tác dụng của trọng lực (Hình 2.7). Hệ số ma sát giữa vật và mặt nghiêng là   0,1. Xác định lực ma sát tác dụng lên vật và gia tốc mà vật thu được

In all trials, the magnitude of the final velocity for g1 + g2 was less than the magnitude of any initial velocity. as mass increased, what happened to the velocity? the velocity decreased. the velocity increased. the velocity of g1 + g2 could not be measured. the velocity was not affected by the mass increase.

Question 11 of 13 (1 point) jump to question: a stairway, ladder, or ramp must be present in excavations in which of the following situations? a. all trenches must have access/egress b. the trench is more than 15 feet wide but only 1 ½ feet deep c. the trench is more than 4 feet deep and the devices must be within 25 feet of all workers

In order of decreasing light-transmitting capabilities of materials, which is the correct sequence? a. transparent -> translucent -> opaque b. opaque -> transparent -> translucent c. opaque -> translucent -> transparent d. translucent -> transparent -> opaque