Adaptive Practice
Dynamics
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Question 1 of 9
⏱ 0:30
Easy
A car of mass 1000 kg accelerates uniformly from rest to 20 m/s in 10 seconds. What is the magnitude of the net force acting on the car?
Medium
A block is sliding on a frictionless horizontal surface with a velocity of 5 m/s. If a horizontal force of 10 N is applied on the block of mass 2 kg, what will be its velocity after 3 seconds?
Medium
A force of 50 N is applied at an angle of 60° to the horizontal on a 10 kg box resting on a frictionless surface. What is the acceleration of the box?
Easy
A 5 kg object is moving with a velocity of 10 m/s. What is the magnitude of the force required to stop it in 4 seconds?
Medium
A 2 kg object is dropped from a height of 20 m. Assuming acceleration due to gravity g = 9.8 m/s² and neglecting air resistance, what is the velocity of the object just before hitting the ground?
Medium
A force F acts on a body of mass m producing an acceleration a. If the force is doubled and the mass is halved, what will be the new acceleration?
Hard
A 3 kg block is pulled along a rough horizontal surface with a force of 20 N at an angle of 30° above the horizontal. The coefficient of friction between the block and surface is 0.2. What is the acceleration of the block? (g = 9.8 m/s²)
Easy
A 1000 kg elevator is lifted upward with an acceleration of 2 m/s². What is the tension in the cable? (g = 9.8 m/s²)
Hard
Two blocks of masses 3 kg and 5 kg are connected by a light string over a frictionless pulley. If the 5 kg block is on a smooth incline of 30° and the 3 kg block hangs vertically, what is the acceleration of the system? (g = 9.8 m/s²)