Physics, 29.06.2020 22:01 ortegaly000
A 25-kg child runs at 4.0 m/s and jumps onto a shopping cart and holds on for dear life. The cart has mass 15 kg. Assuming the child rides on the cart after the collision, the speed of the child and shopping cart just after the child jumps on is:.
a) zero
b) 2.0 m/s
c) 3.0 m/s
d) 2.5 m/s
Answers: 2
Physics, 22.06.2019 14:00, batmanmarie2004
Awater balloon launcher uses an elastic band with a spring constant of 115 n/m to use thee launcher you stretch thee band back with a balloon n it the water balloons have a mass of 1.3 kg a) if you stretch the band by 0.8 m, what elastic force will the band exert? b) with the band stretched 0.8 m, how much elastic potential energy is stored in the spring? c) if you release the band, it pushes forward. what is the kinetic energy of the balloon when it reaches the natural length of the band? d) what is the speed of the balloon when it reaches the natural length of the band?
Answers: 1
Physics, 23.06.2019 04:31, phillipselijah2
5400 j of energy are given off when a 50 g of aluminum pan changes temperature. does the temperature of the pan increase or decrease and by how much?
Answers: 1
A 25-kg child runs at 4.0 m/s and jumps onto a shopping cart and holds on for dear life. The cart ha...
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