A10.0 kg block on a smooth horizontal surface is acted upon by two forces: a horizontal force of 70 n acting to the right and a horizontal force of 30 n to the left. the acceleration of the block will

a. 2.3 m/s2 to the right.
b. 4.0 m/s2 to the right.
c. 10.0 m/s2 to the right.
d. 210.0 m/s2 to the right.

B

Explanation:

as force =70-30 =40

and force = mass ×accleration

so 40 =10×A

A=40÷10=4

and acts to the right

b) returns freshwater to the earth.

c) returns freshwater to the earth.c) occurs after condensation.

d) returns freshwater to the earth.c) occurs after condensation.d) roughly equal to the amount of evaporation.

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the first american roller coaster was the mauch chunk switchback railway, built in the mountains of pennsylvania in the mid-1800s. the track, originally built to send coal to a railway, was reconfigured as a "scenic tour."