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A car moving in a straight line starts at  𝑥 = 0 x=0 at  𝑡 = 0 t=0. It passes:  Point  𝑥 = 29.0   m x=29.0m with speed  11.5   m/s 11.5m/s at  𝑡 = 3.00   s t=3.00s  Point  𝑥 = 375   m x=375m with speed  44.0   m/s 44.0m/s at  𝑡 = 20.0   s t=20.0s
Part A  Calculate the average speed of a complete round trip in which the outgoing 230 km is covered at 98 km/h, followed by a 1.0-h lunch break, and the return 230 km is covered at 60 km/h
A rolling ball moves from \( x_{1} = 8.5 \, \text{cm} \) to \( x_{2} = -4.7 \, \text{cm} \) during the time from \( t_{1} = 3.8 \, \text{s} \) to \( t_{2} = 6.7 \, \text{s} \).
The maximum mass m that a person can hold in a hand when the arm is positioned with a 105° angle at the elbow as shown in (Figure 1) is 29 kg. Assume the forearm and hand have a total mass of 2.0 kg with a CG that is 15 cm from the elbow, and that the biceps muscle attaches 5.0 cm from the elbow.
Assume that trunk of a person makes an angle 0 = 26° with the horizontal as shown in (Figure 1).  Part A  What will be the magnitude of Fy on the fifth lumbar vertebra?
Suppose the point of insertion of the biceps muscle into the lower arm shown in (Figure 1) is 6.0 cm.   How much mass could the person hold with a muscle exertion of 520 N?