PART 1
QUESTION 01
An object with a mass of 2.0 kg is at rest on a horizontal frictionless surface. When the object is pulled with a constant horizontal force of magnitude 5.0 N.
(a) What is the speed of the object after 3.0 s?
(b) What is the speed of the object after it has moved a distance of 5.0 m?
QUESTION 02
A block of mass m [kg] is at rest on a horizontal surface with friction. When the block is pulled at an angle θ above the horizontal with a force F [N], it moves with a constant acceleration in a horizontal direction.
What is the magnitude of the kinetic friction force acting on the block? Where μ' is the coefficient of kinetic friction between the block and the surface, and g [m/s2] is the magnitude of the gravitational acceleration.
(a) μ′ mg [N]
(b) μ′ (mg − F sin θ) [N]
(c) μ′ (mg + F sin θ) [N]
(d) μ′ mg sin θ [N]