Aglob of sticky putty is thrown against a slightly open door so that it sticks on impact and gives the door a momentum of 1.4 kg m/s. a rubber ball with exactly the same mass and velocity as the sticky putty strikes the door and bounces back at its initial speed in the opposite direction. what impulse does it impart to the door?

2.8 kgm/s

1.4 kgm/s

0.70 kgm/s

0 kgm/s

The motor m applies a time-varying force of f (200 t) n, where t is in seconds. box b with mass 200 kg starts from rest, and the coefficients of kinetic and static friction are 0.2 and us 0.3 the acceleration due to gravity is g 9.8 m/s2 b 300 a) find the time ' when the box starts to move. b) calculate the speed of the crate at 3 s c) calculate the power delivered by the motor at t 3 s

The image shows a pendulum in simple harmonic motion the pendulum starts at a and swing to e

If y gets smaller as x gets bigger and y have an relationship?