Answer:
it is to do with the static electricity produced by using the comb
Answer:
F = 132N
Explanation:
Let the pulling force be F
Given the mass of the barrel is 12 Kg and The acceleration is 1.2 m/
We know that Net Force =
Now net force = F - mg
F - mg = ma
F = mg + ma
F = m(a+g) =
Note that there will be a downward force acting on the body which is equal to mg
A 2-kg bowling ball sits on top of a building that is 40 meters tall.
GPE
A 2-kg bowling ball rolls at a speed of 5 m/s on the roof of the building that is 40 tall
its moving n its on top of a bldg. so ans is both KE n GPE
A 2-kg bowling ball rolls at a speed of 10 m/s on the ground.
KE
A 20-kg child is tossed up into the air by her parent. The child is 2 meters off the ground traveling 5 m/s.
moving n in the air. ans is both KE n GPE
eqn: KE= 1/2mv^2, GPE=hmg
A 1,000-kg car has 50,000 joules of kinetic energy. What is its speed?
50000=1/2*1000^v^2
v=10m/s
A 200-kg boulder has 39,200 joules of gravitational potential energy. What height is it at?
39200=200*9.8*h
h=20m
A 1-kg model airplane has 12.5 joules of kinetic energy and 98 joules of gravitational potential energy. What is its speed? What is its height?
12.5=1/2*1*v^2
v=5m/s
98=1*9.8*h
h=10m
Answer:
Multiply the time by the acceleration due to gravity to find the velocity when the object hits the ground. If it takes 9.9 seconds for the object to hit the ground, its velocity is (1.01 s)*(9.8 m/s^2), or 9.9 m/s.
Explanation: