Question

Captain Science, unmasker of fuzzy thinkers and proponent of cosmic truth, drops a 35 kg bowling ball on a stiff spring from a height of 1.0 m and finds that the spring compresses 2 cm. If he drops the bowling ball from a height of 4.0 m, how much will the spring compress?

A. 8 cm

B. 1 cm

C. 16 cm

D. 2 cm

E. 4 cm

Answer #1

here,

the mass of ball , m = 35 kg

when height 1 , h1 = 1 m

compression for first time , x1 =2 cm = 0.02 m

using conservation of energy

m * g * (h1 + x1) = 0.5 * K * x1^2

35 * 9.81 * ( 1 + 0.02) = 0.5 * K * ( 0.02^2)

K = 1.75 * 10^6 N/m

when height 2 , h2 = 4 m

compression for second time be x2

using conservation of energy

m * g * (h2 + x2) = 0.5 * K * x2^2

35 * 9.81 * ( 4 + x2) = 0.5 * 1.75 * 10^6 * ( x2^2)

solving for x2

x2 = 0.04 m = 4 cm

the compression in the spring is E) 4 cm

3a. With a BALL of mass 10 kg you compress a SPRING of k = 1.00
x 106 kg s-2 by Dx = 10 cm. How HIGH does the BALL fly upward when
you release it? B. A person of mass 60 kg jumps from a height of 3
m. She lands on her feet but her knee joints each compress by 0.5
cm. What force did she put on her knees?

21) A person carries a 25.0-N rock through the path shown in the
figure, starting at point A and ending at point B. The total time
from A to B is 1.50 min. How much work did gravity do on the rock
between A and B?
A) 625 J
B) 20.0 J
C) 275 J
D) 75 J
E) 0 J
22) A person carries a 2.00-N pebble through the path shown in
the figure, starting at point A and...

Question 1 (1 point)
Which is not necessary in order to do work on an object (use the
scientific definition of work)?
Question 1 options:
There must be a change in momentum.
A net force must be applied to the object.
The object must undergo a displacement.
A component of the force must be in the direction of motion.
Question 2 (1 point)
The change in gravitational potential energy for a 1.9 kg box
lifted 2.2 m is:
Question 2...

ch 6
1:
It is generally a good idea to gain an understanding of the
"size" of units. Consider the objects and calculate the kinetic
energy of each one.
A ladybug weighing 37.3 mg
flies by your head at 3.83 km/h
.
×10
J
A 7.15 kg
bowling ball slides (not rolls) down an alley at 17.5 km/h
.
J
A car weighing 1260 kg
moves at a speed of 49.5 km/h.
5:
The graph shows the ?-directed force
??...

ADVERTISEMENT

Get Answers For Free

Most questions answered within 1 hours.

ADVERTISEMENT

asked 10 minutes ago

asked 16 minutes ago

asked 23 minutes ago

asked 31 minutes ago

asked 36 minutes ago

asked 41 minutes ago

asked 56 minutes ago

asked 58 minutes ago

asked 1 hour ago

asked 1 hour ago

asked 1 hour ago

asked 1 hour ago