Aboy of mass 45 kg jumps off a wall 1.7m high.
he experiences a uniform acceleration of - 9.8 m...
Physics, 12.10.2019 16:20, rakanmadi87
Aboy of mass 45 kg jumps off a wall 1.7m high.
he experiences a uniform acceleration of - 9.8 m/s^2when
his feet strike the ground, the rest of his body comes to
rest 0.12 s after.
a) calculate the time taken for the boy's feet to reach the
ground and the velocity with which his feet land.
b) calculate the force, impulse and change of momentum that
he experiences.
() find his stopping distance and say what this distance
physically represents. (assume that the ground is hand and
unyielding.
d) find the gravitational potential energy of the boy on the
wall and the kinetic energy just before he lands on the
ground.
Answers: 3
Physics, 22.06.2019 03:30, hannahbaak
Will give brainliest! jay rides his 2.0-kg skateboard. he is moving at speed 5.8 m/s when he pushes off the board and continues to move forward in the air at 5.4 m/s. the board now goes forward at 13 m/s. a. determine jay’s mass. b. determine the change in the internal energy of the system during this process.(express your answer to two significant figures and include the appropriate units.)
Answers: 1
Physics, 22.06.2019 04:00, alexialoredo625
When the force acting on an object points at least partially in the direction of the motion the work done is considered to be negative
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