Question

Q12. Consider the two vectors shown Complete along vector A is A) equal to zero. B) larger than B C) equal to B. D) smaller than B E) perpendicular to vector B the following statement: The component of vector B equilibrium position, spring constant, k-64 Nm. What will be the imitial speced of the ball when it release from the spring? Q13. In designing a spring loaded cannon, You launch a 1.0 kg ball by compressing a spring 0.15 m from its A) 12.0 m's B) 12 m/s C) 123 D) 121 E) None of the above 014. A planet of mass m is a distance d from Earth. Another planet of mass 2m is a distance d from Earth. Which force vector best represents the direction of the total gravitation force on Earth? A) B) C) D) E) d) c) al b) Q15. You applied a force on the object and the object moves up on rough incline surface as shown in the figure What are the forces do work on this object ? A) Only Applied force and Frictsion B) Only Applied force, gravity and Nonnal C) Only Applied force, Friction and gravity D) All the forces act on the object E) None of the above Q16.A50g ball is launched at an unknown angle from point A from the top of a 30m tall cliff. The ball reaches a maximum height of 10m above the top of the cliff before falling to the ground at point B. Neglecting alr resistance, what is the change in kinetic energy from polnt A to point B? A) 15] B) 12j C) 20 D)-15J E)-12J

Answer 1

12) vector A and B are in the same direction

so resultant will be larger than B

so option B) larger than B is the correct answer.

13) Kinetic energy = Potential energy

0.5mv^2 = 0.5kx^2

1*v^2 = 64*0.15^2

v = 1.2 m/s