Homework Statement
The figure shows an 7.9 kg stone at rest on a spring. The spring is compressed 10 cm by the stone. The stone is then pushed down an additional 32 cm and released. To what maximum height (in cm) does the stone rise from that position?
Homework Equations
k = mg/d
v =...
[Resolved] Unit-vector momentum?
Homework Statement
A 0.200 kg ball hits a wall with a velocity of (7.60 m/s)i + (8.60 m/s)j + (3.50 m/s)k. It rebounds from the wall with a velocity of (1.80 m/s)i + (3.40 m/s)j + (-4.70 m/s)k. In unit-vector notation, what are (a) the change in the ball's...
Homework Statement
A certain airplane has a speed of 267.2 km/h and is diving at an angle of θ = 28.0° below the horizontal when the pilot releases a radar decoy (Fig. 4-37). The horizontal distance between the release point and the point where the decoy strikes the ground is d = 777 m. (a)...
But the problem is that I do not know the horizontal velocity. I suppose this could be found by dividing the distance by the time, but I am not sure how to find the time. You say it can be found by the height, but how? Am I on the right track here:
Vy = 0
d = h
a = g = -9.8
t = ?
d=Vyt +...
[Resolved] Kinematics problem?
Homework Statement
A small ball rolls horizontally off the edge of a tabletop of height h. It strikes the floor a distance x horizontally away from the edge of the table. (a) How long is the ball in the air? (b) What is its speed at the instant it leaves the...