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Jack lifted a 25kg mass to a height of 2.0m in 10.0seconds. on the other hand james was able to lift the same height in 2.0 seconds, who among them has a greater power?
how to measure the maximum kinetic energy of someone sprinting 100 metres?
A body of mass 700g falls from a height of 10m.Find the momentum of the
body.
You are trying to move a 500-N crate across a level floor. To start the crate moving, you
have to pull with a 230-N horizontal force. Once the crate “breaks loose” and starts to move, you
can keep it moving at constant velocity with only 200 N.
Draw a free-body diagram for crate moving at constant speed.
d. What forces are acting on the crate moving at constant speed?
An object is thrown straight down from the top of a building at a speed of 43 m/s. It hits the ground with a speed of 87 m/s. a) How high is the building? b) How long was the object in the air? (note that there is an acceleration due to gravity).
Q.4. A robot lands on Mars. Its x and y coordinates are given by equations:
x(t) = 2m –(0.25m/s2
)t2
y(t)= (1.0 m/s)t +(0.025m/s3
)
(a).What is the position and distance from landing at t=2 seconds?(b)What is the
displacement and average velocity during the interval from t=0 s to t= 2?(c).Derive
a general expression for its instantaneous velocity vector and find its instantaneous
velocity in its component form as well as in terms of its magnitude.
A robot lands on Mars. Its x and y coordinates are given by equations: x(t) = 2m –(0.25m/s2 )t2
y(t)= (1.0 m/s)t +(0.025m/s3)
(a).What is the position and distance from landing at t=2 seconds?(b)What is the displacement and average velocity during the interval from t=0 s to t= 2?(c).Derive a general expression for its instantaneous velocity vector and find its instantaneous velocity in its component form as well as in terms of its magnitude.
A shelter Island ferry boat moves with a cosntant velocity vox =8 m/sfor 60 sec.It then shuts off its engines and coasts.Its coasting velocity is given by vx = vox t21 /t2,
where t1= 60 s.What is the displacement of the boat for the interval 0<t<∞?
A Cannon is fired with a muzzle velocity of 300 m/s, at an angle of 60 degrees. Find the
range, time of flight, maximum height attained by the projectile.
