103 Answered Questions for the topic kinematics

10/31/17

How can I show that the range of a projectile will be the same for two complementary angles using trig identities?
How can I show that the range of a projectile will be the same for two complementary angles using trig identities?
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Kinematics Graphs

10/21/17

A stone is dropped from some unknown hejght if jt travels half of the distance in last second of its a motion find the total time,final velocity,initial height
How do we get answer of this question
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10/16/17

Projectile motion - solving for launch velocity
A ball is hit at an initial velocity, 30° (above the horizontal) off a 20 m high cliff. Solve for the launch velocity given that the ball hits the ground at a speed of 25.1 m/s
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10/11/17

During a collision a car is brought to rest from a velocity of 30ft/s in a distance of 3ft. Determine the acceleration factor
I need to determine the acceleration factor, do I need to find time first and use the equation a=(vf-vi)/t? Or can I just use the acceleration factor equation f=|a/g|
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10/03/17

A seemingly impossible projectile motion problem
A bomber flies at a speed of 60 m/s, 1100 m above the ground. With its target 900 m away horizontally (on the ground), what is the vertical launch speed needed to drop the bomb to reach its target?
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Kinematics Physics

10/01/17

Physics kinematics problem help?
1. A physics student, exhausted after hours of study, plays a game to relieve her stress. She tries to slide an ice cube across the surface of her desk such that, when the cube slides off of the... more
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10/01/17

Help on Physics kinematic problems please?
1. Car 1 moves eastward with a constant speed of 20 m/s. Car 2, at rest on the side of the road, accelerates at 2 m/s squared to the east at precisely the instant Car 1 is beside it. How long does... more
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09/28/17

Kinematics equations (two objects)
A dragster and a regular car race. The car travels at a constant speed of 28 m/s. 7 seconds later, the dragster accelerates at a rate of 4 m/s^2. What will be the final velocity of the dragster... more
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Kinematics Physics Acceleration

09/22/17

Falling objects rate of acceleration
A diver hits the water at a velocity of 17.64 m/s from a 16 m high board. What is the diver's rate of deceleration when the diver reaches a depth of 1.85 m under water?
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Kinematics Physics Math

09/18/17

Kinematics problem involving two objects
Two objects are thrown up. Both are thrown up at 16 m/s, but one of the them is thrown up 2 seconds later after the first object is thrown. When and where do the objects meet?   I'm ending up... more
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Kinematics

09/16/17

How long after the release of the first stone does the second stone hit the water?
A rock climber stands on top of a 56 m -high cliff overhanging a pool of water. He throws two stones vertically downward 1.0 s apart and observes that they cause a single splash. The initial speed... more
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Kinematics

09/16/17

What is the acceleration of the pike during this strike?
When striking, the pike, a predatory fish, can accelerate from rest to a speed of 4.5 m/s in 0.15 s .What is the acceleration of the pike during this strike?
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Kinematics Physics Motion

09/14/17

A question on calculating time
A pitcher throws a baseball to the batter 40 m/s and the batter hits the ball at 50 m/s. Assuming that the length from the mound to home plate is 18.4 m, how long will it take for the ball to... more
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Kinematics Physics Motion Free Fall

09/14/17

How do I find the total time when an object goes below the point of origin?
For example, how do I calculate the the total time a ball is in the air, if a ball is thrown upwards 10 m from a height of 30 m above ground level?
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Kinematics

09/13/17

Motion question
A bullet is shot from a pistol and travels at a speed of 200 m/s, hitting its target 1.5 km away. How long will it take, from when the gun is fired, for the shooter to hear the sound of the bullet... more
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Kinematics

09/13/17

Kinematics equations
If a satellite orbits the earth at an altitude of 300 km at a speed of 6.95 km/s, what is the period, in hours, of the satellite's orbit? (Radius of the earth is 6.38 x 10^6 m)
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Kinematics

09/11/17

How do I derive the equation vf^2=vi^2+2ad using vf=vi+at and d=vi*t+(at^2)/2?
How do I derive the equation vf^2=vi^2+2ad using vf=vi+at and d=vi*t+(at^2)/2?
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Kinematics Physics

08/18/17

How to calculate stopping distance?
How to calculate stopping distance? 
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Kinematics Physics

07/18/17

What is the acceleration of the falling object near the surface of this planet?
When and object is dropped from a height of 20.0 m above the surface of Planet Z, it will fall 5.00 m during the 2nd second of the fall. What is the acceleration on Planet Z?
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Kinematics

06/29/17

same range for different angle of projection how it is true ?
In projectile motion we can mathematically proof that if the angle of projection from horizontal be complementary to another, both exerts same range.. But in practical if we throw to particles one... more
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Kinematics

05/07/17

Kinematics question
A train normally travels at a uniform speed of 72 km/h on a long stretch of straight, level track. On a particular day, the train must make a 2.0 min stop at a station along this track. If the... more
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Kinematics Physics

03/05/17

If v (t) = 35 + 9t find an expression and value for x (t) and a (t) for the periods t=1.5s and t=3.2s?
If v (t) = 35 + 9t find an expression and value for x (t) and a (t) for the periods t=1.5s and t=3.2s?
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Kinematics

10/14/16

Physics free fall
Hello everyone , I have solved this question, and would like someone to discuss with me whether my answer is right,the question says ,A rocket ascends vertically from rest at ground level with... more
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Kinematics

10/09/16

An exercise in Kinematics Mechanics
Trains A and B are travelling in the same direction on two parallel straight tracks , at the moment that A passes B , A is travelling at a constant 20 m.s-1 and B is travelling at 5 m.s-1 and... more
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09/23/16

Chemical Kinetics (Energy released)
in which case energy released is min:- a)cl to cl- b)p to p- c) n to n- d) c to c- method used in finding it is?
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