vật có khối lượng 5kg chịu tác dụng của lực kéo F=14N, hệ số ma sát giữa vật và mặt sàn nằm ngang 0,2, góc alpha=30, g=10m/s2. hợp lực tác dụng vào vật có độ lớn là

Which is special about a dc circuit ? a. it has both series and parallel components b. it has only series or only parallel components c. charge moves in a single direction d. charge moves back and forth quickly

Does the distance travelled by an oscillating mass between times t=0 and t2 equal the displacement of the particle over the same time period if t2> t/2? hint: consider a sine wave starting at t1=0, then consider a closing wave starting at t1=0, for your explanation.

Abowling ball rolls 32 meters in 0.8 seconds what is the average speed in m/s of the bowling ball in m/s