A2.0 kg projectile with initial velocity =7.0 m/s experiences the variable force F 2.0t i +4.0t2 N, where t is in s. ▼ Part A What is the projectile's speed at t = 2.0 s? Express your answer with the appropriate units. ►View Available Hint(s) V= Submit ON Part B HÅ Value Previous Answers Units * Incorrect; Try Again; 4 attempts remaining μA t = Value ? Units input for part A At what instant of time is the projectile moving parallel to the y-axis? Express your answer with the appropriate units. ► View Available Hint(s) Units ?

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Electric Charges and Fields

One of the fundamental properties is the electromagnetic property. Charge cannot be destroyed by any process and this contributes formally to the law of charge conservation.