(T) 2. Two children wrestle over a toy of mass 1.5 kg. The boy pulls with a force of 6.0 N [W] while the girl pulls with a force of 8.0 N [E]. The toy slides with an acceleration of 1.0 m/s'. (a) Draw a free-body diagram of the situation. (2 marks) (b) Determine the value of the frictional force acting on the toy. (3 marks) (A) 3. Assume that for each pulse, a human heart accelerates 2.1 x 10-2 kg of blood from 0.18 m/s to 0.28 m/s during a time interval of 0.10 s. Calculate the magnitude of: (a) the acceleration of the blood. (2 marks) (b) the net force needed to cause that acceleration. (3 marks) 7