1 an electron of mass 911 x 10-31 kg has an initial speed, Ask an Expert

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1. An electron of mass 9.11 x 10^-31 kg has an initial speed of 4.00 X 10⁵ m/s. It travels in a straight line, and its speed increases to 6.80 X 10⁵ m/s in a distance of 4.00 cm. Assume its acceleration is constant.

(a) Determine the magnitude of the force exerted on the electron.

(b) Compare this force (F) with the weight of the electron (_Fg), which we ignored. F/F_g= 7.

2. Two forces F₁ and F₂ act on a 7.80-kg object. F₁ = 40.0 N and F₂ = 11.0 N.

2197_Two forces act on a object.png

(a) Find the acceleration of the object for the configuration of forces shown in Figure (a).

(b) Find the acceleration of the object for the configuration of forces shown in Figure (b).

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