Answers created by Joaquín M.

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Question #a8f56
Question #fa936
Question #106f9
You place a block of wood into a beaker of water and it floats. What can you say about the buoyant force on the block?
An object with a mass of $3 k g$ $3 kg$ is traveling in a circular path of a radius of $7 m$ $7 m$ . If the object's angular velocity changes from $3 H z$ $3 Hz$ to $9 H z$ $9 Hz$ in $3 s$ $3 s$ , what torque was applied to the object?
The force applied against a moving object travelling on a linear path is given by $F (x) = sin x + 2$ $F(x)= sinx + 2$ . How much work would it take to move the object over $x \in [0, \frac{π}{3}]$ $x in [ 0,pi/3]$ ?
An object with a mass of $2 k g$ $2 kg$ is traveling at $14 \frac{m}{s}$ $14 m/s$ . If the object is accelerated by a force of $f (x) = x + x e^{x}$ $f(x) = x+xe^x$ over $x \in [0, 9]$ $x in [0, 9]$ , where x is in meters, what is the impulse at $x = 8$ $x = 8$ ?
An object, previously at rest, slides $6 m$ $6 m$ down a ramp, with an incline of $\frac{3 π}{8}$ $(3pi)/8$ , and then slides horizontally on the floor for another $3 m$ $3 m$ . If the ramp and floor are made of the same material, what is the material's kinetic friction coefficient?
Question #25f42
A baseball is thrown vertically with a velocity of 13 m/s. How high does it go? At what two times is the ball 5 m above the ground?
The force applied on a moving object with a mass of $1 k g$ $1 kg$ on a linear path is given by $F (x) = 2 x + 3$ $F(x)=2x +3$ . How much work would it take to move the object over $x \in [1, 3]$ $x in [1,3]$ ?
A projectile is shot from the ground at a velocity of $4 \frac{m}{s}$ $4 m/s$ at an angle of $\frac{π}{6}$ $pi/6$ . How long will it take for the projectile to land?
A ball with a mass of $2 k g$ $2 kg$ moving at $14 \frac{m}{s}$ $14 m/s$ hits a still ball with a mass of $21 k g$ $21 kg$ . If the first ball stops moving, how fast is the second ball moving? How much kinetic energy was lost as heat in the collision?
Question #f66fb
Question #0864e
If a $2 k g$ $2 kg$ object is constantly accelerated from $0 \frac{m}{s}$ $0m/s$ to $16 \frac{m}{s}$ $16 m/s$ over 6 s, how much power musy be applied at $t = 1$ $t=1$ ?
It took a 500.0-newton ballerina a force of 250 joules to lift herself upward through the air. How high did she jump?