Right!tommy2st said:0 is the final velocity. is the answer 3s? i think i may have got it
30=10t
t=3
anyone am i right?
Almost. Careful with signs.also the height it reaches using 3?
would i use d=30*3 + 1/2(10)(3^2)
Yep!tommy2st said:would it be d= 30*3 + 1/2(-10)(3^2)?
giving me 45?
Right. So you can find the distance using average speed X time.tommy2st said:average speed 15 m/s?
Solve it exactly as you solved the first part. First figure out the time.also i need help with this part... On the way up, at what height is the speed of the ball equal to half its speed of projection?
i get that it wants me to find at what distance v = 15 but I am having trouble munipulating the equations to solve this
Right. The initial velocity is 30 m/s, not 15. (That's the final velocity.)tommy2st said:okay thank you ill try and edit this
t=1.5
d=(15)(1.5)+(1/2)(-10)(1.5^2)= 11.25?
or (30)(1.5)+(1/2)(-10)(1.5^2)= 33.75?
i think its the second one
Kinematics is a branch of physics that studies the motion of objects, including their position, velocity, and acceleration, without considering the forces causing the motion.
Kinematics is used in various fields, such as engineering, robotics, and sports, to analyze and predict the motion of objects. It is also used in the development of transportation systems, such as cars and airplanes.
The three main equations used in Kinematics are the equations of motion: v = u + at, s = ut + 1/2at^2, and v^2 = u^2 + 2as, where v is the final velocity, u is the initial velocity, a is the acceleration, t is the time, and s is the displacement.
Linear Kinematics deals with the motion of objects in a straight line, while angular Kinematics deals with the motion of objects in a circular or rotational path. Angular Kinematics also involves concepts such as angular velocity, angular displacement, and angular acceleration.
To solve a Kinematics problem, you need to identify the known and unknown quantities, choose the appropriate equation, and substitute the values into the equation. It is important to use consistent units and pay attention to the direction of motion. You can also use graphs or diagrams to help visualize the problem.