Explanation:
It is given that,
Mas of the car, 
Initial speed of the car, 
Mass of the truck, 
Initial speed of the car, 
Final speed of the car, 
(a) It is a case of elastic collision. Let 
is the final velocity of the truck right after the collision. Using the conservation of linear momentum to find it :
(b) Initial kinetic energy is given by :
Final kinetic energy is given by :
The change in mechanical energy of the car truck system in the collision:
The loss in kinetic energy is 10029.39 Joules.
(c) The change in mechanical energy gets changed energy gets changed in the form of heat and light.
Hence, this is the required solution.
Answer:
1.06 m
Explanation:
The kinetic friction of the grass on the sled is the product of friction coefficient and the normal force, which equals to gravitational force. Let g = 9.81 m/s2:
So the deceleration caused by kinetic friction on the 60 kg sled is
If the sled on a speed of 2.5m/s and then subjected to a deceleration of 2.943 m/s2, then we can use the following equation of motion to find out the distance traveled by the sled before rest:
where v = 0 m/s is the final velocity of the sled when it stops, 
= 2.5m/s is the initial velocity of the can when it hits, a = -2.943 m/s2 is the deceleration, and 
is the distance traveled, which we care looking for:
Hello
The jovian density is
, while the density of terrestrial planets is much higher. For instance, the earth's density is
. The reason of this difference is in the different chemical composition: while jupiter is made of gas (mainly hydrogen), with lower density, while the terrestrial planets are made of solid and liquid, with compounds of higher density.
Answer:
As the Ballon pulls up, the distance between the Ballon and the center of the earth increases, the gravitational pull reduces and the gravity potential energy increases.
