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Motion and Forces
Page 5
Questions (1,354)
A riverboat travels with a velocity of 4.60 m/s from one shore to another. The velocity of the river is 2.30 m/s. If the width
4 answers
asked by
jh
1,339 views
A car is moving at 90 km/h when the driver notices an animal that is about to cross the road 100 m away and he decides to apply
4 answers
asked by
Thabo Samson
1,017 views
You and your friend throw balloons filled with water from the roof of a several story apartment house You simply drop a balloon
2 answers
asked by
Kimberly
1,219 views
You drop a stone down a well. You hear the splash 2.23 s later. How deep is the well? speed of sound 343 m/s
4 answers
asked by
fatih
2,371 views
Pelicans tuck their wings and free-fall straight down when diving for fish. Suppose a pelican starts its dive from a height of
4 answers
asked by
victor
3,105 views
An object is dropped from a height of 49 meters. The object takes 3.2s to hit the ground. The final velocity of the object when
3 answers
asked by
EJ
910 views
In January 2004, NASA landed exploration vehicles on Mars. Part of the descent consisted of the following stages:
Stage A:
4 answers
asked by
Anonymous
1,642 views
A boxcar of mass 200 tons at rest becomes uncoupled on a 2.5 degree grade. If the track is considered to be frictionless, what
4 answers
asked by
michelle
1,608 views
A car is parked on a cliff overlooking the ocean on an incline that makes an angle of 20.0° below the horizontal. The negligent
4 answers
asked by
Elisa
2,530 views
A woman with a mass of 50kg runs at a speed of 8m/s and jumps onto a giant skateboard with a mass of 25kg. What is the combined
6 answers
asked by
Anonymous
686 views
A 500kg spacecraft was traveling through space at a constant velocity when it fired its rocket engine. The engines produce a
3 answers
asked by
skyler
654 views
An airplane is flying at an altitude of 4000 feet and descends at rate of 200 feet per minute. Determine whether the altitude is
3 answers
asked by
gage
2,009 views
A plane has a velocity of 400 mph to the SW. A wind from the west is blowing at 50 mph. Find the resultant speed and direction.
H
4 answers
asked by
Nikhil
1,050 views
the pilot in an airplane observes the angle of depression of a light directly below his line of sight to be 30.4 degrees. a
4 answers
asked by
rhinechilde
1,936 views
1. A ship has a top speed of 3.0 m/s in calm water. The current of the ocean tends to push the boat at 2.0 m/s on a bearing of
3 answers
asked by
Amanda
1,454 views
A rock is projected from the edge of the top of
a building with an initial velocity of 16.3 m/s at an angle of 39 ◦ above the
2 answers
asked by
Maria
566 views
A car travels the same distance at constant speed around two curves, one with twice the radius of curvature of the other. For
4 answers
asked by
Nikki
2,264 views
An m = 6.80-kg clay ball is thrown directly against a perpendicular brick wall at a velocity of 22.0 m/s and shatters into three
4 answers
asked by
Em
571 views
Jill and her friends have built a small rocket that soon after lift-off reaches a speed of 900 m/s
How high above the Earth can
4 answers
asked by
Michael
1,741 views
a circus artist drops a ball from a high wire. The ball takes 1.5 seconds to reach the ground. (i) Find the height of the high
4 answers
asked by
Ed
875 views
A pelican flying along a horizontal path drops a fish from a height of 3.3 m. The fish travels 8.2 m horizontally before it hits
4 answers
asked by
Luma
2,536 views
There are competitions in which pilots fly small planes low over the ground and drop weights, trying to hit a target
A pilot
3 answers
asked by
raquel
757 views
A truck is moving at a speed of 70km/h. The exhaust pipe above the truck cab sends out a trail of smoke that makes an angle of
20
6 answers
asked by
samson
1,147 views
A trained dolphin leaps from the water with an initial speed of 12 m/s. It jumps directly towards a ball held by the trainer a
3 answers
asked by
Tom
3,554 views
a car is traveling 20.0 m/s when the driver sees a child standing in the road. he takes 0.80 seconds to react, then steps on the
3 answers
asked by
allison
4,864 views
While a person is walking, his arms swing through approximately a 45° angle in .530s. As a reasonable approximation, we can
4 answers
asked by
GG
1,054 views
By landing properly and on soft ground (and by being lucky!), humans have survived falls from airplanes when, for example, a
3 answers
asked by
Anonymous
372 views
Several motorboats with the same mass are used in an experiment. The forces of the different motors versus their accelerations
4 answers
asked by
Katy
1,013 views
The city is trying to figure out how long the traffic light should stay yellow at an intersection. The speed limit on the road
2 answers
asked by
Mariam
882 views
After deploying her parachute, a skydiver falls through the air with a constant speed of 7.00 m/s . As she falls, there is a
2 answers
asked by
Anwar
716 views
A car mass of 900kg travelling at 15m/s crashes into a wall and comes to rest in 0.3s. Calculate the average decelaration.
3 answers
asked by
James
770 views
An overly eager physics student wants to confirm that the acceleration of gravity is ag=9.8 m/s^2. To check this, the student
3 answers
asked by
Morgan
878 views
Can someone please help me with this problem?
A 200-1b block rests on a horizontal plane. Find the magnitude of the force P
3 answers
asked by
Latoya
844 views
A de-orbit burn, similar (but not the same) to that presented in the previous math problem, has been performed. During this
3 answers
asked by
Wolf
916 views
A swimmer wants to cross a river, from point A to point B, as shown in the figure. The distance d1 (from A to C) is 200 m, the
3 answers
asked by
Alison
894 views
An animal-rescue plane flying due east at
40 m/s drops a bale of hay from an altitude of 73 m . The acceleration due to gravity
3 answers
asked by
nick
3,750 views
A ball rolling on an inclined plane dors so with constant acceleration. One ball, A, is released from rest on the top of an
3 answers
asked by
Edward.Oki
1,278 views
A person climbs from a Paris metro station to the street level by walking up a stalled escalator in 96.5 s. It takes 60.0 s to
3 answers
asked by
Laura
1,636 views
The acceleration of gravity at the surface of the moon is approximately 1/6 that at the surface of the Earth (9.8m/s). What is
3 answers
asked by
Ashley
1,907 views
A ball is thrown vertically upward (assumed to be the positive direction) with a speed of 21.0 m/s from a height of 9.0 m.
(a)
2 answers
asked by
Steve
701 views
A car is traveling 28 m/s when the driver sees a child standing on the road. He takes 0.8 s to react, then steps on the brakes
3 answers
asked by
Josh
1,773 views
A 1200 kg car is moving at 95 km/h when the driver notices a deer down the road. He immediately moves his foot toward the brake
3 answers
asked by
James
427 views
a solid ball and a cylinder roll down an inclined plane. which reaches the bottom first?
A. The ball reaches the bottom first. B.
7 answers
asked by
Nevaeh
1,183 views
a ball of mass 4kg falls to the floor ; it lands with aspeed 6m/s.it.bounces off with the same speed.show that its momentum has
4 answers
asked by
bahiru woldemariam
649 views
A stuntman drives a dirt bike on a curved track with a radius of 15.9 m. If he starts from rest and accelerates at 1.54 m/s2, at
3 answers
asked by
Nickelous
342 views
A 2000kg car is slowed down uniformly from 20m/s to 5 m/s in 4s.
What is the average total force on the car during this time.
3 answers
asked by
Pau
2,933 views
A ball is thrown into the air with an upward velocity of 26 feet per
second. Its height, h, in feet after t seconds is given by
4 answers
asked by
Wes
1,360 views
A boat starts out at 20km/h in direction 30 degrees. However, the boat is blown off course by a 12km/h wind blowing from 80
3 answers
asked by
Felix
821 views
During takeoff, an airplane climbs with a speed of 180m/s at an angle of 42 degrees above the horizontal. The speed and
2 answers
asked by
Mel
732 views
A satellite is in a circular orbit 810 km above the Earth’s surface; i.e., it moves on a circular path under the influence of
3 answers
asked by
Kiara
1,276 views
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Parent Categories (18)
Classical mechanics
Dynamics
Engineering/Physics-Mechanics
Forces
Kinematics
Mechanics
Mechanics or Kinematics
Newton's Laws of Motion
Newtonian Mechanics
Physical Science
Physical Sciences
Physics
Physics and Mechanics
Physics and Sports
Science and Physics
Science/Earth Science
Science/Physics
Tennis