Quiz 2 for 1st sec. ( newton second law )

Name :
Group
Knowing that the air resistance for a plane was 1000 n and the power of the plane motor was 11000 if the mas of the plane was 500 kg then the acceleration of the plane is
20
2
10
1
If you know that the maximum wieght for an elevator is 200 n if the elevator was used to lift a mass of 10 kg then the acceleration by which the 10 kg is lifted will be
100
10
20
1
A ball of mass 1/2 kg was left to fall into mud knowing that the the ball reached the mud after 5 sec from free falling if the ball stopped after diving 10 m in the mud then the total force acting on the ball while moving in the mud will be 
10 n
20 n
30 n
40 n
Given that four different body are moving with the same acceleration an elephant and a gazalle and a duck and a rabbit which of them will require a greater force to move himself forward
Rabbit
Elephant
Duck
Gazalle
If a car having a motor with constant horse power if the mass of the car was doupled what will happen to the acceleration
Increase two times
Decrease to half
Increase four times
Decrease to quarter
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