I think it is D sorry it’s wrong
Answer:
b) No acceleration in the vertical
c) 35N
d) 35N
e)
Explanation:
a) The situation can be shown in the free body diagram shown in the figure below where F is the applied force, Fr is the friction force, W is the weight of the book and N is the normal force exerted vertically up from the desk to the book
b) The vertical movement is restrained by the normal force which opposes to the weight. In absence of any other force, they both are in equilibrium and the net force is zero
c) The net horizontal force acting on the book is the vectorial sum of the applied force and the friction force. Since they lie in the same axis and are opposed to each other:
d) The net force acting on the book is the vector sum of all forces in all axes. The normal and the weight cancel each other in the y-axis, so our resulting force is the x-axis net force, computed as above:
in the x-axis
e) Following Newton's second law, the acceleration is calculated as
Answer:
Team A wins the frame with three points. The opposing team gets zero points for the frame.
Explanation:
Answer:
Part a)
Part b)
Part c)
Part d)
Part e)
Part f)
Explanation:
Part a)
As we know that the maximum angle deflected by the pendulum is
so the maximum height reached by the pendulum is given as
so we will have
now gravitational potential energy of the pendulum is given as
Part b)
As we know that there is no energy loss while moving upwards after being stuck
so here we can use mechanical energy conservation law
so we have
Part c)
now by momentum conservation we can say
Part d)
Work done by the bullet is equal to the change in kinetic energy of the system
so we have
Part e)
recoil speed of the gun can be calculated by momentum conservation
so we will have
Part f)
Total energy released in the process of shooting of gun