Question

1-An object is tied to a chord in Spohn in a circle of radius
1.3 3 m about a vertical axis edit speed of 5m/s. it will
experience both a centripetal and a gravitational force. calculate
the angle the cord makes relative to the horizontal.

2-a 300 KG canon
fires a 4 KG ball. If the kinetic energy of the ball is 1.6x10^5J
what is the kinetic energy of the cannon at the moment after the
ball leaves a barrel?

Answer #1

1. A balls rolls 7 m. If the radius of the ball is 1.3 m, find
theta, the angle it turns thru in radians
2. A 112 kg merry go round with a 4 m radius rotates on a
vertical axis. If I push at the edge with a force of 160 N find the
angular acceleration. The moment of inertia of a disk is I=1/2 m
r^2

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...

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...

do all five questions
Question 1
20 pts
Ignoring the effects of air resistance, if a ball falls freely
toward the ground, its total mechanical energy
Group of answer choices
increases
remains the same
not enough information
decreases
Flag this Question
Question 2
20 pts
A child jumps off a wall from an initial height of 16.4 m and lands
on a trampoline. Before the child springs back up into the air the
trampoline compresses 1.8 meters. The spring constant...

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 7 minutes ago

asked 36 minutes ago

asked 37 minutes ago

asked 40 minutes ago

asked 46 minutes ago

asked 50 minutes ago

asked 1 hour ago

asked 1 hour ago

asked 1 hour ago

asked 1 hour ago

asked 2 hours ago

asked 2 hours ago