Work
What is the SI unit for work?
Joules (J)
What does KE stand for
Kinetic energy
Power is the rate of ____
doing work
What is the type of work when the angle between Force and distance is more than 90 degrees?
The work is negative
What is meant by kinetic energy?
The energy due to motion
Decreasing ______ increases power.
Time
A player shoots a ball with a force 100 newtons to move it for 5 meters. if the force is in the same direction to the distance, what is the value of the work done?
500 J
Kinetic energy depends on__________
Mass and velocity
What is the relation between power and speed?
Power = Force x speed
What will happen to the work, if the force doubled, and the displacement decreased to half
The work will not change
If the objects velocity was decreased. The work of the object will be_____________
Negative
What happens to the power if the work was tripled and the time remains constant?
The power will be tripled.
A student tries to push his 3 Kg bag towards the ground. if he exerts 250 N force perpendicular to the the direction of the distance which is 4 meters to the right. Calculate the value of work done
ZERO
A truck and a car move with the same velocity, which of them has more kinetic energy? Why?
The truck as it has more mass
What is the power for machine does 25000 joules of work in 3.5 minutes?