Homework Statement
A 0.038-kg pet lab mouse sits on a 0.35-kg air-track cart, as shown in (Figure 1) . The cart is at rest, as is a second cart with a mass of 0.25 kg. The lab mouse now jumps to the second cart. After the jump, the 0.35-kg cart has a speed of v1=0.86m/s.
What is the speed v2...
Homework Statement
A 50.0-kg block is being pulled up a 16.0° slope by a force of 250 N that is parallel to the slope. The coefficient of kinetic friction between the block and the slope is 0.200. What is the acceleration of the block?
Homework Equations
Fk=μkN
F=MA
The Attempt at a...
Homework Statement
A 1.40 kg block slides with a speed of 0.885 m/s on a frictionless horizontal surface until it encounters a spring with a force constant of 637 N/m . The block comes to rest after compressing the spring 4.15 cm.
Part A
Find the spring potential energy, U, the kinetic energy...
Homework Statement
A skateboarder at a skate park rides along the path shown in (Figure 1) .If the speed of the skateboarder at point A is v=1.3m/s, what is her speed at point B? Assume that friction is negligible.
Homework Equations
ui+ki=uf+kf
u=mgh
k=1/2mv2
The Attempt at a Solution...
Homework Statement
Water skiers often ride to one side of the center line of a boat, as shown in the figure (Figure 1) . In this case, the ski boat is traveling at 15 m/s and the tension in the rope is 90 N.
If the boat does 3700 N of work on the skier in 54.8 m, what is the angle θ between...
Homework Statement
A compound bow in archery allows the user to hold the bowstring at full draw with considerably less force than the maximum force exerted by the string. The draw force as a function of the string position x for a particular compound bow is shown in (Figure 1) .
Part A
How...
Homework Statement
What is the final position of the object if its initial position is x = 0.40 m and the work done on it is equal to -0.19 J?
Homework Equations
work(J)= Fx ΔX
The Attempt at a Solution
I do not know where to begin??? please give me a hint where to begin.
Homework Statement
Children in a tree house lift a small dog in a basket 5.05 m up to their house.
If it takes 221 J of work to do this, what is the combined mass of the dog and basket?
Homework Equations
work(J)= force(N)x Distance(m)
The Attempt at a Solution
W=FD........221J=F(5.05)m
I'm...
Homework Statement
a)Find the magnitude of the acceleration of the two blocks in (Figure 1) . Assume the top block slides without friction on the horizontal surface.
b)If the 12-N block in (Figure 1) is replaced with a 12-N force pulling downward, as in (Figure 2) , is the acceleration of the...
Homework Statement
What is the minimum horizontal force F needed to make the box start moving in (Figure 1) ? The coefficients of kinetic and static friction between the box and the floor are 0.25 and 0.46, respectively.
Homework Equations
Fs= mu * N
The Attempt at a Solution
So I know that...
Homework Statement
What is the minimum horizontal force F needed to make the box start moving in (Figure 1) ? The coefficients of kinetic and static friction between the box and the floor are 0.28 and 0.39, respectively.
Homework Equations
fk=mu N
fs=mu N
The Attempt at a Solution
Im not...
Homework Statement
During several practice runs you stand at the end of a diving board and launch the basketball horizontally from a position 4.50 m above the water. If the average landing spot is6.25 m horizontally from your initial position, what is the average launch speed?
Homework...