Question

7. A 77.0 kg ice hockey goalie, originally at rest, catches a 0.150 kg hockey puck slapped at him at a velocity of 34.0 m/s. Suppose the goalie and the ice puck have an elastic collision and the puck is reflected back in the direction from which it came. What would their final velocities (in m/s) be in this case? (Assume the original direction of the ice puck toward the goalie is in the positive direction. Indicate the direction with the sign of your answer.)

puck = -33.86 m/s

goalie = ____ m/s

9. During an ice show a 70.0 kg skater leaps into the air and is caught by an initially stationary 90.0 kg skater.

(a)What is their final velocity in meters per second assuming negligible friction and that the 70.0-kg skater's original horizontal velocity was 4.00 m/s?

1.75 m/s

(b)How much kinetic energy is lost in joules?

___ J

17. The upper leg muscle (quadriceps) exerts a force of

*F*_{Q} = 1120 N,

which is carried by a tendon over the kneecap (the patella) at the angles shown in the figure below.

Find the magnitude in newtons and direction in degrees counter-clockwise from an axis directed to the left of the force exerted by the kneecap on the upper leg bone (the femur).

Magnitude = ____ N

direction = 10 ° counter-clockwise from an axis directed to the left

Answer #1

A 67.0 kg ice hockey goalie, originally at rest, catches a 0.150
kg hockey puck slapped at him at a velocity of 34.0 m/s. Suppose
the goalie and the ice puck have an elastic collision and the puck
is reflected back in the direction from which it came. What would
their final velocities (in m/s) be in this case? (Assume the
original direction of the ice puck toward the goalie is in the
positive direction. Indicate the direction with the...

Contents »
A 81.0-kg ice hockey goalie, originally at rest, catches a
0.150-kg hockey puck slapped at him at a velocity of 28.0 m/s.
Suppose the goalie and the ice puck have an elastic collision and
the puck is reflected back in the direction from which it came.
What is the final velocity of the goalie?

A 70.0-kg ice hockey goalie, originally at rest, has a 0.170-kg
hockey puck slapped at him at a velocity of 35.5 m/s. Suppose the
goalie and the puck have an elastic collision, and the puck is
reflected back in the direction from which it came. What would the
final velocities of the goalie and the puck be in this case? Assume
that the collision is completely elastic.

A
young 43-kg ice hockie goalie, originally at rest, catches a
0.145-kg hockey puck slapped at him at a speed of 34.5 m/s. In this
problem, take the original direction of the puck as positive.
Part A) Suppose the goalie and the ice puck have an elastic
collision and the puck is reflected back in the direction from
which it came. What would the final velocity of the puck, in meters
per second, be in this case?
Vf,2 =
Part...

A 70.0 kg70.0 kg ice hockey goalie, originally at rest, has a
0.170 kg0.170 kg hockey puck slapped at him at a velocity of 41.5
m/s.41.5 m/s. Suppose the goalie and the puck have an elastic
collision, and the puck is reflected back in the direction from
which it came. What would the final velocities of the goalie and
the puck be in this case? Assume that the collision is completely
elastic

A 70-kg hockey player, originally at rest, hits a 0.15-kg hockey
puck slapped at him at a velocity of 35 m/s. Following the hit the
ice puck reflected back at 34.85 m/s in the direction from which it
came. Ignore friction. Determine the final velocity of the hockey
player.
Select one:
a. -5.25 m/s
b. 5.25 m/s
c. 0 m/s
d. 0.1497 m/s

Two identical pucks collide on an air hockey table. One puck was
originally at rest. If the incoming puck has a velocity of 7.10 m/s
along the +x-axis and scatters to an angle of 36.0° above the
+x-axis, what is the velocity (magnitude and direction) of the
second puck? (You may use the result that θ1 −
θ2 = 90° for elastic collisions of objects that have
identical masses.)
Velocity (magnitude) =
Velocity (direction) = below +x-axis
What is the...

Two identical pucks collide on an air hockey table. One puck was
originally at rest. If the incoming puck has a velocity of 6.50 m/s
along the +x-axis and scatters to an angle of 32.0° above the
+x-axis.
A) What is the velocity (magnitude and direction) of the second
puck? (You may use the result that θ1 − θ2 = 90° for elastic
collisions of objects that have identical masses.)
Velocity (magnitude) = _______ Velocity (direction) = ________
below +x-axis...

This 80 kg ice
skater moving at 2.5 m/s throws a 200 g puck in the direction he is
moving at 15 m/s relative to the ice.
a. Find the
velocity of the ice skater after throwing the puck. (Ignore
friction)
b. A second
skater who is 60 kg initially at rest catches the puck. Find the
velocity of the second skater after catching the puck.

During an ice show a 55.0 kg skater leaps into the air and is
caught by an initially stationary 90.0 kg skater.
(a) What is their final velocity in meters per second assuming
negligible friction and that the 55.0-kg skater's original
horizontal velocity was 4.00 m/s? ________ m/s
(b) How much kinetic energy is lost in joules? _______J

ADVERTISEMENT

Get Answers For Free

Most questions answered within 1 hours.

ADVERTISEMENT

asked 5 minutes ago

asked 17 minutes ago

asked 28 minutes ago

asked 32 minutes ago

asked 40 minutes ago

asked 43 minutes ago

asked 1 hour ago

asked 2 hours ago

asked 2 hours ago

asked 2 hours ago

asked 3 hours ago

asked 3 hours ago