A student pulls a box of books on a smooth horizontal floor with a force of 100 N in a direction of 37.0° above the horizontal. The mass of the box and the books is 40.0 kg. (a) Draw the free-body diagram for the box
(b) Calculate the acceleration of the box. (c) Calculate the normal force acting on the box.
(a) The box is acted on by the force of gravity which points toward the center of the earth. The normal force is directed toward the box perpendicular to the surface of the floor. The pulling force is directed away from the box at an angle 37.0 degrees above the horizontal.
(b) 2.00 m/s2
(c) 332 N
You might also like to view...
In a cloud formation, water vapor condenses into water droplets which get bigger and bigger until it rains. This will cause the temperature of the air in the clouds to
A) increase. B) decrease. C) stay constant. D) freeze.
A boy on a skate board skates off a horizontal bench at a velocity of 10 m/s. One tenth of a second after he leaves the bench, to two significant figures, the magnitudes of his velocity and acceleration are:
a. 10 m/s; 9.8 m/s2. b. 9.0 m/s; 9.8 m/s2. c. 9.0 m/s; 9.0 m/s2. d. 1.0 m/s; 9.0 m/s2. e. 1.0 m/s; 9.8 m/s2.
The look-back time is numerically equal to the distance to a galaxy in light-years
a. True b. False Indicate whether the statement is true or false
Equal charges, one at rest, the other having a velocity of 104 m/s, are released in a uniform magnetic field. Which charge has the largest force exerted on it by the magnetic field?
a. The charge that is at rest. b. The charge that is moving, if its velocity is parallel to the magnetic field direction when it is released. c. The charge that is moving if its velocity makes an angle of 45o with the direction of the magnetic field when it is released. d. The charge that is moving if its velocity is perpendicular to the magnetic field direction when it is released. e. All the charges above experience equal forces when released in the same magnetic field.