Question

Answer #1

An astronaut standing on the surface of the moon
throws a rock up into the air with an initial velocity of 8.617
m/s. When the rock is released, the astronaut’s hand is 1.16 m
above the surface of the moon. (Acceleration due to gravity on the
moon = 1.63 m/s2)
i) How long does it take for the rock to reach its maximum
height?
ii) What is the rock’s maximum height?
iii) What is the time taken by the rock...

Galileo was able to estimate the height of mountains on the Moon
by measuring the length of their shadows.
a. If a shadow is 5 kilometers long when the Sun is 10° above
the horizon, estimate how tall the mountain is._______ km
b. Estimate at what angle the Sun must be above the horizon for
the shadow to be five times as long as the height of the mountain.
____°
[Hint: To help visualize the problem, draw a tall mountain...

A rock with a mass of 0.5 kg is thrown horizontally with a
velocity of 10 m/s from the edge of a 175m tall cliff. How long
will it take the rock to hit the ground below? What is the
magnitude of its velocity when it hits?

1. A car traveling 69 km/h is 247 m behind a truck traveling 93
km/h. How long will it take the car to reach the track? Calculate
to one decimal
2.Suppose one of Napoleon cannons has a muzzle speed of 32m/s.
It was aimed at 54 ◦ angle. What height can the cannon
ball reach? Use g = 9.8 m/s2
Calculate to one decimal
3.A girl throws a rock horizontally, with a velocity of 13 m/s,
from a bridge. It...

I decide to drop a ball of the top of a building of height 10
meters. How long does it take for the ball to hit the ground?
(Antiderivative application). Assume g = -10 m/s^2 and assume no
air resistance.

Joanna drops a box from the top of a large open window. The
height of the window is 5.00 m. (Asuume the magnitude of the
gravitational acceleration is g = 10 m/s^2.)
A) If Joanna is timing the box drop, how long will it take to
reach the bottom of the window?
B) Her friend is standing 15.00m below the bottom of the window
and is going to catch the falling box. How fast will the box be
traveling at...

An object of mass m = 10 kg is released from a height of 2 m on
top of a vertically aligned spring with spring constant k = 1000
N/m. The relaxed length of the spring is 1 m and the lower end is
attached on a rigid level surface. Assume that the spring is
massless and ideal; and neglect air-resistance. Calculate the
maximum compression and extension of the spring after the released
object falls on top of the spring....

I throw a ball straight upward at an initial velocity of +40
m/s. Assuming g is -10 m/s2, (a) how long would it take for the
ball to reach its maximum height before falling back down? (b) what
will its final speed be right before reaching your hand again at
the same height as where you threw it? (c) how does the
acceleration of the ball change as it reaches the top of its path
going 0 m/s?

a pure sample of a radioactive substance has 16*10^12 atoms
and the half life is 3 minutes. How long does it take until 5*10^11
atoms of the substance have not yet decayed?

1)A 7.50 kg disk with a diameter of 88.0 cm is spinning at a
rate of 280 revolutions per minute. A block of wood is pressed into
the edge of the disk with a force of 35.0 N. The coefficient of
friction between the wood and the disk is 0.300. How long does it
take the disk to stop spinning?
A)4.60s B)22.0s C)15.0s D)1.20s E)8.90s
2)The moon has a mass of 7.40 x 10^22 kg and a diameter of 3476...

ADVERTISEMENT

Get Answers For Free

Most questions answered within 1 hours.

ADVERTISEMENT

asked 3 minutes ago

asked 7 minutes ago

asked 11 minutes ago

asked 12 minutes ago

asked 38 minutes ago

asked 39 minutes ago

asked 47 minutes ago

asked 54 minutes ago

asked 57 minutes ago

asked 59 minutes ago

asked 1 hour ago

asked 1 hour ago