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∙ 5y ago2/32
Levi Fox
It has no net force.
If a 90 kg weightlifter exerts a 1000 N force upwards against a 50 kg barbell, the NET vertical force acting on the barbell is 1000 N. It does not matter how heavy the weightlifter or the barbell might be.
I'm not entirely sure what the question is asking. I'll take a stab at it though. An object that has a non-zero net force applied to it will move. It will accelerate in the direction of the net force at a rate given by F / m, where F is the net force (N) and m is the mass of the object (kg).
Detrmine the acceleration of a car of mass 900 kg when a net force of 2700 n acts on it
Starting from rest, a 2 kg body acquires a speed of 8 m/s in 2 seconds. The net force acting on the body is
3000 N
Newton's 2nd law of motion: F = M AForce = (0.015 kg) x (12 m/s2) = 0.18 kg-m/s2 = 0.18 newton
Net force is 6N
How do you determine the net force on an object? Decide which direction is positive motion. Motion is the opposite direction is negative The forces must in a straight line!! Add all the forces in straight line acting on the object. Example To the right is positive A 5 N force pushes a 10 Kg object to the right. A 2 N force pushes the same 10 Kg object to the left. The 5 N forces is positive and the 2N force is negative Net force = +5 N - 2 N = + 3 N To determine the acceleration use Newton's 2nd law of motion F = Mass * acceleration + 3 N = 10 Kg * a a = 10 Kg ÷ + 3 N a = +3 ⅓ m/s^2 The positive sign means the object is accelerating to the right!! If the forces are not linear, you must use vectors, but the net force in any direction is still the sum of the vectors in that direction.
It has no net force.
Force = (mass in kg)x(acceleration in m.s^-2)
The cart is decelerating, not accelerating.
Numbers are important.F = ma. So multiply the acceleration in meters per second (per second, which you appear to have left out) by the mass in kilograms and that will give you the force in newtons.
Force = mass * acceleration Force = (3 kg)(5 m/s2) = 15 Newtons ===============( takes about 1 Newton to press a doorbell )
If a 90 kg weightlifter exerts a 1000 N force upwards against a 50 kg barbell, the NET vertical force acting on the barbell is 1000 N. It does not matter how heavy the weightlifter or the barbell might be.
A Diwali rocketis ejecting 0.05 Kg of gases per second at a speed of 400m/s. What is the accelerating force on the rocket.
Force = mass * acceleration Force = (4kg + 46kg) * 3 m/s2 Force = 50kg * 3 m/s2 Force = 150 kg*m/s2 or Force = 150 Newtons