103 Answered Questions for the topic kinematics

04/24/22

Linear velocity problem
The diameter of the back wheel of a tricycle is 1.5 times longer than the front wheel's diameter. When the tricycle is moving, the surface points of the back wheel move with the linear velocity of... more
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04/24/22

Kinematics: compare the velocities
The motion equations of two moving bodies are:x1=1+3tx2=t+2t2Compare the velocities during a) the end of first five seconds; b) the end of last five secondsThe correct answer for a) should be:... more
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04/24/22

The bus is going with an acceleration of 2 m/s^2. What is the time frame during which the velocity of the bus increases by 72 km/h
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01/15/22

Question on Dynamics. Finding the force
A man of 75kg is standing in the basket of a hot-air balloon. The balloon is rising at 5ms-1 and 4s later it is descending at 3ms-1. Assuming constant acceleration, find the normal contact force of... more
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Kinematics Physics Free Fall

01/14/22

How much time to evade a falling object? Free-fall word problem
A woman accidentally drops a flowerpot from the rooftop of a 25-meter building. A 1.5 meters tall man walking notices the falling flowerpot above him at about 4 meters above the ground. How much... more
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Kinematics Physics Word Problem

01/14/22

What is the solution to get the acceleration of the lion in order to run the same distance as its prey?
A lion is trying to catch an antelope. The antelope runs for 12.0s at a constant velocity of 36.0m/s. Starting from rest, what constant acceleration must the lion maintain in order to run the same... more
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01/04/22

Generic physics knowledge test
An apple, a metal ball, and a paper is falling in a vacuum. Which one has the greatest acceleration?
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01/03/22

Velocity of a bus during 12 s uniformly increased from 10 m/s to 15 m/s. Find the average velocity during 12 s
Velocity of a bus during 12 s uniformly increased from 10 m/s to 15 m/s. Find the average velocity of a bus during 12 s
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Kinematics Physics Mechanics

11/06/21

Uniform acceleration
The velocity of a bus uniformly increased from 10 m/s to 15 m/s during 12 seconds. Find the average velocity of the bus during the first 12 seconds. Answer: 12,50 m/s
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Kinematics Math Physics

10/11/21

A car accelerates at 2.7 m/s/s for 5.4 s, reaching a speed of 18 m/s. During the period of acceleration, the car travels a distance of...
A car accelerates at 2.7 m/s/s for 5.4 s, reaching a speed of 18 m/s. During the period of acceleration, the car travels a distance of...I know how to find acceleration and velocity but I'm stuck.... more
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Kinematics Math Physics

10/11/21

A car accelerates at 2.7 m/s/s for 5.4 s, reaching a speed of 18 m/s. During the period of acceleration, the car travels a distance of...
A car accelerates at 2.7 m/s/s for 5.4 s, reaching a speed of 18 m/s. During the period of acceleration, the car travels a distance of...I know how to find acceleration and velocity but I'm stuck.... more
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09/29/21

Please answer the following problem in the DESCRIPTION and PROVIDE A FULL EXPLANATION
The acceleration of a NASCAR race car is zero. Does this necessarily mean that the velocity of the car is zero? If the speed of the car is constant as it goes around the track, is its average... more
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09/21/21

Short basic physics knowledge question
The resultant force of all forces acting on the body is opposite to the direction of velocity. How the body is moving?Four possible choices:A) Speeding upB) Slowing downC) UniformlyD) It is not... more
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09/14/21

Basic Physics - Kinematics (Horizontal and Vertical Motion)
Please do provide me a good step-by-step solution and a final answer... still having troubles with coping up with these.You are at the top of a 500-meter-high building and you saw a zombie 750... more
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07/29/21

Resultant force and its representation
An object of 3 kg mass with velocity in x-axis defined by the equation vx=5-2t. What is the magnitude of the resultant force's representation in the x-axis?Answer: -6N
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07/27/21

Kinematics: compare time and speed
How to solve this problem:The first train half of its time moved with 80 km/h, another half with 40 km/h. The second train went slowly accelerating backward from 80 km/h to 40 km/h. Which train... more
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07/27/21

Kinematics problem involving velocities
Object A, during the first half of its distance, moved with the velocity of 80 km/h, during the second half: 40 km/h. Object B, during the first half of its time, moved with 80 km/h, during the... more
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07/20/21

Physics problem find initial velocity
Given the equation of the moving body s=3t2+2t+1 (in SI units), find its initial velocity (at t=0). Correct answer: 2 m/s
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Kinematics Calculus Optimaztion

03/24/21

The area of a circle is decreasing at the rate of 5m^2/s. At what rate is the radius of the circle decreasing at that moment. Also, at what rate is the diameter decreasing at that moment?
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Kinematics Science Physics

01/19/21

Angular Kinematics
Hello, I am struggling in my science class and I'm not sure how to do the unit we are on so I was wondering if someone could give me the answers and how to solve them so I can do better. Thank you!... more
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Kinematics Science Physics

01/11/21

Angular Kinematics
Hello, I am struggling in my science class and I'm not sure how to do the unit we are on so I was wondering if someone could give me the answers and how to solve them so I can do better. Thank you!... more
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Kinematics Physics

10/26/20

A car is driving at 25 m/s when the driver sees a sign indicating the speed limit has dropped to 15 m/s. It takes the car 4 seconds to slow down to the correct speed. What was the car's acceleration?
Hint: A formula is needed.
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10/15/20

1-D Kinematics of Particles
Particle 𝐴, which is initially at rest, wants to meet Particle 𝐵, however they are 𝑋𝑌𝑍 ft away from one another. The motion of particle 𝐴 heading toward 𝐵 is defined by the relation: 𝑠 = 1/𝑎2 where... more
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Kinematics Physics

09/22/20

Kinematics Equation
A ball rolling down a hill was displace 5 m while uniformly accelerating from rest. If the final velocity was 20 m/s. What was the rate of acceleration?Your answer
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08/15/20

Falling and bouncing ball problem
I have this interesting physics problem I can't solve. Could you please explain it in simple terms?A small ball thrown vertically down from height of 4,9 m with initial speed of 9,8 m/s hit a... more
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