An object that weighs 75.0 N is pulled on a horizontal surface by a horizontal pull of 50.0 N to the right. The friction force on this object is 30.0 N to the left. The acceleration of the object is closest to
A) 0.267 m/s2
B) 1.07 m/s2
C) 2.61 m/s2
D) 10.5 m/s2
C
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A box is sliding down an incline tilted at a 12.0° angle above horizontal. The box is initially sliding down the incline at a speed of 1.50 m/s. The coefficient of kinetic friction between the box and the incline is 0.340
How far does the box slide down the incline before coming to rest? A) 0.920 m B) 2.33 m C) 1.78 m D) 0.720 m E) The box does not stop. It accelerates down the plane.
About what percent of Earth's surface is covered with water?
a. 70% b. 10% c. 50% d. 30%
When a 6-kg object increases its potential energy by 180 J, approximately how has its position changed?
a. It has risen vertically 3 m. b. It has fallen vertically 3 m. c. It has risen vertically 30 m. d. It has moved horizontally 30 m.
The absolute magnitude of a star is the apparent magnitude it would have if it were 10 pc from Earth
a. True b. False Indicate whether the statement is true or false