# physics (work shown)

posted by .

A 0.63-kg block is hung from and stretches a spring that is attached to the ceiling. A second block is attached to the first one, and the amount that the spring stretches from its unstrained length quadruples. What is the mass of the second block?

My work is as follows:

F=kx
mg=kx Since k is unknown, I chose to use 1

.63*9.8=1*x
x=2.52 kg

My answer is incorrect. What am I doing wrong?

• physics (work shown) -

.63 x 9.8 = 6.174 not 2.52

• physics (work shown) -

2.52 is the total weight. Subtract weight 1 from that to get your answer.

• physics (work shown) -

Sorry, showed my work incorrectly.

.63*9.8=1x
x=6.174

then F=k4x
m*9.8=1*24.696
m=2.52

## Similar Questions

A spring is hung from the ceiling. A 0.300 kg block is then attached to the free end of the spring. When released from rest, the block drops 0.170 m before momentarily coming to rest. (a) What is the spring constant of the spring?
2. ### physics help me

A spring is hung from the ceiling. A 0.300 kg block is then attached to the free end of the spring. When released from rest, the block drops 0.170 m before momentarily coming to rest. (a) What is the spring constant of the spring?
3. ### Physics

A spring is hung from the ceiling. When a coffee mug is attached to its end, it stretches 3.0 cm before reaching its new equilibrium length. The block is then pulled down slightly and released. What is the frequency of oscillation?
4. ### physics mechanics

A block weighing 17 N oscillates at one end of a vertical spring for which k = 120 N/m; the other end of the spring is attached to a ceiling. At a certain instant the spring is stretched 0.24 m beyond its relaxed length (the length …
5. ### physics

An object is attached to the lower end of a 100-coil spring that is hanging from the ceiling. The spring stretches by 0.210 m. The spring is then cut into two identical springs of 50 coils each. As the drawing shows, each spring is …
6. ### physics

A 0.44-kg block is hung from and stretches a spring that is attached to the ceiling. A second block is attached to the first one, and the amount that the spring stretches from its unstretched length triples. What is the mass of the …
7. ### physics

An unstrained horizontal spring has a length of 0.33 m and a spring constant of 209 N/m. Two small charged objects are attached to this spring, one at each end. The charges on the objects have equal magnitudes. Because of these charges, …
8. ### Physics

Consider the figure above, where a rigid beam of negligible mass and 10 m long is supported by a cable attached to a spring. When NO block is hung from the beam, the length L (cable-spring) is equal to 5 m. Assume that immediately …
9. ### PHYSICS

A block weighs 15 N and is suspended from a spring that is attached to the ceiling. The spring stretches by 0.075 m from its unstrained length. By how much does the spring stretch when a 24-N block is suspended from it?
10. ### PHYSICS

A spring is hung from the ceiling. A 0.477 -kg block is then attached to the free end of the spring. When released from rest, the block drops 0.153 m before momentarily coming to rest, after which it moves back upward. (a) What is …

More Similar Questions

Post a New Question