A 2 kg cookie tin accelerated at 3 m/s^2 towards N-E at an angle of 50° off E direction over a friction less horizontal surface. The acceleration is caused by three horizontal forces of F1= 10 N (S-W 30° off W), F2 = 20 N towards N. What is the third force F3 in unit vector notation and in magnitude angle notation?

Answer: it will take   4.36 seconds to reach her average velocity 10.69 miles/hour.explanation:   we have equation of motion ,where s is the displacement, a is the acceleration, u is the initial velocity and t is the time taken.average velocity = displacement/ time taken.average velocity = 10.69 miles/hr = 10.69*1.6*1000/(60*60) = 4.75 m/s4.75 = s/ts = 4. 1we also have acceleration = 2.18 m/s², initial velocity = 0 m/sso it will take   4.36 seconds to reach her average velocity 10.69 miles/hour.