Newton’s Second Law Model (2nd Law of Motion Apparatus)
Product Code : SCL-AM-11167
Quick answer: The Newton's Second Law Model is a dynamics cart and pulley system used to verify F = ma. A hanging slotted weight pulls a low-friction cart across the bench, and students measure how the acceleration changes with force and with mass. Lab Exports manufactures it in Delhi for schools, colleges and universities.
Specifications
| Item | Specification |
|---|---|
| Model type | Dynamics cart and pulley system (F = ma demonstrator) |
| Construction | Metal base, high-impact cart, brass or steel weights |
| Pulley | Low-friction rotary pulley with table clamp |
| Primary application | Physics and mechanics education |
How the F = ma experiment is done
Newton's second law states that the acceleration of a body is proportional to the net force on it and inversely proportional to its mass, a = F/m. Here a string runs from the cart over the clamped pulley to a weight hanger. The hanging mass m supplies the pulling force mg, and cart mass M and hanging mass m accelerate together, so a = mg/(M + m) when friction is small.
The acceleration is found from the time t the cart takes to cover a measured distance s from rest, using a = 2s/t^2.
- Clamp the pulley to the edge of a level bench and set the cart on the bench in line with it.
- Tie the string to the cart, pass it over the pulley and attach the weight hanger.
- Mark a start line and a finish line a known distance apart.
- Release the cart from rest and time its run between the lines; repeat and average.
- Move slotted weights from the cart to the hanger to change the force while keeping the total mass constant, then repeat.
A graph of acceleration against pulling force is a straight line through the origin, confirming that a is proportional to F. Holding the force fixed and adding mass to the cart shows the acceleration falling in proportion to 1/m.
Key features
- Low-friction dynamics cart and rotary pulley keep friction losses small
- Adjustable table clamp fixes the pulley securely at the bench edge
- Slotted weights let students vary the pulling force or the cart mass in steps
- Inelastic string keeps cart and hanging mass moving with the same acceleration
- Supports both constant-mass and constant-force investigations of F = ma
What is included
- 1 x low-friction dynamics cart
- 1 x pulley with adjustable table clamp
- 1 x spool of inelastic string
- 1 x set of slotted laboratory weights
- 1 x instruction and experiment manual
Documentation and supply
An instruction and experiment manual is supplied with the apparatus. Most Lab Exports products carry a one-year manufacturer warranty.
Lab Exports manufactures the Newton's Second Law Model (2nd Law of Motion Apparatus) at its works in Laxmi Nagar, Delhi, and supplies it to schools, colleges and universities in India and 60+ countries, handling the export documents for each shipment. More about the company is on the About Lab Exports page.
Related Applied Mechanics products
- Newton's Third Law Model (3rd Law of Motion Apparatus) (SCL-AM-11166)
- Newton's 1st Law Model (SCL-AM-11168)
- Newton's Cradle Model (SCL-AM-11165)
- Anti Gravity Cone (SCL-AM-11157)
- Hydro Power Model (SCL-AM-11156)
- Hydraulic Brake Model (SCL-AM-11154)
The full range is in the Applied Mechanics section of the Physics Lab range.
Frequently asked questions
How is Newton's second law verified with this apparatus?
The hanging weight provides a known force. Students measure the cart's acceleration for several forces at constant total mass to show a is proportional to F, then change the mass at constant force to show a is proportional to 1/m.
Why move weights from the cart to the hanger instead of adding new ones?
Moving weights keeps the total accelerating mass M + m constant, so any change in acceleration comes from the change in force alone.
What is the price of the Newton's Second Law Model (2nd Law of Motion Apparatus)?
Prices are not published on the website. Add the Newton's Second Law Model (2nd Law of Motion Apparatus) to the Enquiry Cart with the Add To Cart button on this page, or email [email protected] with the house code SCL-AM-11167 and the quantity, to receive a quotation.
Does Lab Exports manufacture the Newton's Second Law Model (2nd Law of Motion Apparatus)?
Yes. Lab Exports manufactures the Newton's Second Law Model (2nd Law of Motion Apparatus) at its works at 11/315, Lalita Park, Laxmi Nagar, Delhi 110092, under house code SCL-AM-11167.
Request a quote
Email [email protected] with the house code SCL-AM-11167 and the quantity, or add the Newton's Second Law Model (2nd Law of Motion Apparatus) to the Enquiry Cart with the Add To Cart button on this page. Tender buyers can also see the Tenders and OEM page.
