Question

General Physics V Mechanics Spi X e Mastering Physics OPTIONAL CH X + > c session masteringphysics.com/myct/item View offset=next&assignment Problem De 127567711 # Apps M Gmail Youtube PHY 4A SPRING 2020 <OPTIONAL CH 6 Dynamics I- Force Problems No Friction Problem 6.16 Estefania & ③ The position of a 2.4 kg mass is given by (2 - 5t") m, where t is in seconds. 13 or 15 Review Part A What is the net horizontal force on the mass at t=0 s? Express your answer to two significant figures and include the appropriate units. 2° Å * OE? Value: Units Submit Request Answer Part B What is the net horizontal force on the mass at 2-18? Type here to search un 3 1a/WERT

Answer 1

- = 2.4kg x = 2t3-sta Now_acceleration au dex dt dtt de lat = d (672-100) = 12t-To - az idt-10 I now acceleration cit t o- -- ez 1260)-10 --2 lo more 1 So force, f = mă : 2.4x (-10) =-24 N 1) Tf: -24 N Ang at t = 18 a = 12 (1)-10 = 2 m/s f = 9.4X 2 = 4.8N at tilf F=4.8N -