Question

4. In a fit, a toddler throws straight down his favorite 2 kg toy with an initial velocity of 1.7 m/s. What is the magnitude of the change in velocity of the toy from t = 0.22 seconds to t = 0.42 seconds?

7. Two people play tug of war. The 100-kg person on the left pulls with 1,140 N, and the 70-kg person on the right pulls with 835 N. Assume that neither person releases their grip on the rope with either hand at any time, assume that the rope is always taut, and assume that the rope does not stretch. What is the magnitude of the tension in the rope in Newtons?

Answer 1

Initial velocity (1) 2 1 07 m/s Change in velocity = ? when t= 0.228 to 0.428 velocity at tzo+225 Na let gt So, V 1.7+ 9.880.22 o velocity at t=0.425 Vq Z 1o7+ 9 8 X 0.42 Vq - V, = 9,840042 - 0.22 AV = 9.8X 0.20 AVE x 1.96m