A 12.0-kg mass is placed on a 25.0° incline and friction keeps it from sliding. The coefficient of static friction in this case is 0.580 and the coefficient of sliding friction is 0.520 . The mass is given a shove causing it to slide down the incline. Taking down the incline as positive, what is the acceleration of the mass while it is sliding?

a. -1.99 m/s2
c. -0.477 m/s2
b. 1.99 m/s2
d. 0.477 m/s2


C

Physics & Space Science

You might also like to view...

A wheel rotates about a fixed axis with an initial angular velocity of 20 rad/s. During a 5.0-s interval the angular velocity decreases to 10 rad/s. Assume that the angular acceleration is constant during the 5.0-s interval. How many radians does the wheel turn through during the 5.0-s interval?

a. 95 rad b. 85 rad c. 65 rad d. 75 rad e. 125 rad

Physics & Space Science

Define efficiency for an engine. Is it possible for an engine to have an efficiency equal to one?

What will be an ideal response?

Physics & Space Science

A car starts from rest and accelerates with a constant acceleration of 1.00 m/s2 for 3.00 s. The car continues for 5.00 s at constant velocity. How far has the car traveled from its starting point?

A) 24.0 m B) 9.00 m C) 19.5 m D) 4.50 m E) 15.0 m

Physics & Space Science

An astronaut leaves Earth in a spaceship at a speed of 0.960c relative to an observer on Earth. The astronaut's destination is a star system 14.4 light-years away (one light-year is the distance light travels in one year)

According to the astronaut, how long does the trip take? A) 14.4 y B) 22.7 y C) 9.34 y D) 15.0 y E) 4.20 y

Physics & Space Science