6. Intro to Forces (Dynamics)

Newton's First & Second Laws

6. Intro to Forces (Dynamics)

# Newton's First & Second Laws - Video Tutorials & Practice Problems

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### Intro to Forces & Newton's Second Law

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### Solving for Forces Using Newton's Second Law

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### Newton's 1st Law

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PRACTICE PROBLEMS AND ACTIVITIES (40)

- A hockey puck with mass 0.160 kg is at rest at the origin (x = 0) on the horizontal, frictionless surface of t...
- A small 8.00-kg rocket burns fuel that exerts a time-varying upward force on the rocket (assume constant mass)...
- A 4.50-kg experimental cart undergoes an acceleration in a straight line (the x-axis). The graph in Fig. E4.13...
- A 4.50-kg experimental cart undergoes an acceleration in a straight line (the x-axis). The graph in Fig. E4.13...
- A hockey puck with mass 0.160 kg is at rest at the origin (x = 0) on the horizontal, frictionless surface of t...
- A dockworker applies a constant horizontal force of 80.0 N to a block of ice on a smooth horizontal floor. The...
- A box rests on a frozen pond, which serves as a frictionless horizontal surface. If a fisherman applies a hori...
- Due to a jaw injury, a patient must wear a strap (Fig. E4.3) that produces a net upward force of 5.00 N on his...
- To extricate an SUV stuck in the mud, workmen use three horizontal ropes, producing the force vectors shown in...
- To extricate an SUV stuck in the mud, workmen use three horizontal ropes, producing the force vectors shown in...
- Two dogs pull horizontally on ropes attached to a post; the angle between the ropes is 60.0°. If Rover exerts ...
- A man is dragging a trunk up the loading ramp of a mover's truck. The ramp has a slope angle of 20.0°, and the...
- A man is dragging a trunk up the loading ramp of a mover's truck. The ramp has a slope angle of 20.0°, and the...
- II) Using focused laser light, optical tweezers can apply a force of about 10 pN (piconewtons) to a 1.0-μm-dia...
- (II) A high-speed 14-car Italian train has a mass of 640 metric tons (640,000 kg). It can exert a maximum forc...
- (II) Superman must stop a 120-km/h train in 150 m to keep it from hitting a stalled car on the tracks. If the ...
- An 18-kg child is riding in a child-restraint chair, securely fastened to the seat of a car (Fig. 4–69). Assum...
- When jumping straight up from a crouched position, an average person can reach a maximum height of about 60 cm...
- What is the acceleration, as a multiple of g, if this force is applied to a 110 kg bicyclist? This is the comb...
- If a car stops suddenly, you feel 'thrown forward.' We'd like to understand what happens to the passengers as ...
- On September 8, 2004, the Genesis spacecraft crashed in the Utah desert because its parachute did not open. Th...
- An astronaut is inside a 2.25 × 106 kg rocket that is blasting off vertically from the launch pad. You want th...
- An astronaut is inside a 2.25 × 106 kg rocket that is blasting off vertically from the launch pad. You want th...
- A light rope is attached to a block with mass 4.00 kg that rests on a frictionless, horizontal surface. The ho...
- On September 8, 2004, the Genesis spacecraft crashed in the Utah desert because its parachute did not open. Th...
- Problems 35, 36, 37, 38, 39, and 40 show a free-body diagram. For each: a. Identify the direction of the acce...
- FIGURE EX5.14 shows an object's acceleration-versus-force graph. What is the object's mass?
- A constant force is applied to an object, causing the object to accelerate at 10 m/s². What will the accelerat...
- A constant force is applied to an object, causing the object to accelerate at 10 m/s². What will the accelerat...
- A single force with x-component Fₓ acts on a 2.0 kg object as it moves along the x-axis. A graph of Fₓ versus ...
- A single force with x-component Fₓ acts on a 500 g object as it moves along the x-axis. The object's accelerat...
- The 100 kg block in FIGURE EX7.24 takes 6.0 s to reach the floor after being released from rest. What is the m...
- Two blocks are attached to opposite ends of a massless rope that goes over a massless, frictionless, stationar...
- (II) A 27-kg chandelier hangs from a ceiling on a vertical 3.4-m-long wire.(a) What horizontal force would be ...
- (II) A 27-kg chandelier hangs from a ceiling on a vertical 3.4-m-long wire.(b) What will be the tension in the...
- II) According to a simplified model of a mammalian heart, at each pulse approximately 20 g of blood is acceler...
- (III) A person jumps from the roof of a house 2.8 m high. When he strikes the ground below, he bends his knees...
- (II) An object is hanging by a string from your rearview mirror. While you are accelerating at a constant rate...
- A package of mass m is placed onto a horizontal conveyor belt moving at speed v (Fig. 7–32). The coefficient o...
- (II) A 3.0-kg object has the following two forces acting on it:→F₁ = (16î + 12ĵ) N→F ₂ = ( -10î + 22ĵ) NIf the...