DIGITAL LESSONS > A-LEVEL DYNAMICS
Dynamics
Explore the fundamental principles governing the motion of objects in this chapter. Through pre-recorded video lessons, mastery practices, and concise summary notes, you’ll grasp concepts like linear momentum, Newton’s Laws, impulse, and the fascinating world of interactions and explosions.
👨🏻🏫3 Lessons * 2 Hours/Week
💻14 Conceptual Videos & 50 Worked Example Videos
Conceptual Videos
Summary Notes
Mastery Practices
🟩Easy
Body A of mass 5.0 kg moves to the right with a velocity of 4.0 m s⁻¹. Body B of mass 3.0 kg moves to the left with a velocity of 8.0 m s⁻¹. Calculate (a) the momentum of A, (b) the momentum of B, (c) the total momentum of A and B.
Video Explanation
Answer
🟩Easy
A parachutist of mass 80 kg descends vertically at a constant velocity of 3.0 m s⁻¹.
What is the net force acting on him?
Video Explanation
Answer
🟨Medium
A marksman holds a rifle of mass M = 3.00 kg loosely in his hands, so as to let it recoil freely when fired. He fires a bullet of mass m = 5.00 g horizontally with a velocity of vB = 300 m s⁻¹. What is the recoil velocity vR of the rifle?
Video Explanation
Answer
🟨Medium
A projectile of mass m is fired with initial velocity u from a point P as shown below. The projectile lands with velocity v at angle θ to the ground.
Neglecting air resistance, in terms of m, v, and θ, determine the magnitude of the change in momentum of the mass between leaving P and entering Q is
Video Explanation
Answer
🟥Advance
An object A of mass 2.0 kg moves to the right along a frictionless surface at a speed of 40 m s⁻¹. It collides head-on with a 10 kg object B which is moving to the left at 4.0 m s⁻¹. After the collision A recoils and moves to the left at 30 m s⁻¹. Find final velocity of B.
Video Explanation
Answer
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