You'll use Newton's laws, of course.Maya KDeoimmich said:I'm not sure what equation to use to find the normal force and then the acceleration.
Oops, one more force acts. (I meant to say four, not three.) But those three are good. What's missing?Maya KDeoimmich said:Gravity, friction, and the applied force
Exactly.Maya KDeoimmich said:normal force? not sure
Which way? I.e. is it tending to push down on the wagon or up on it?Maya KDeoimmich said:an angle of 46 with the horizontal
How do you get that? Isn't the mg vertical?Maya KDeoimmich said:Fy = mgcos46-N
Ouch! Unless the wheels are locked they mean rolling resistance, not friction, but don't worry about that for now.Maya KDeoimmich said:the coefficient of kinetic friction between the wagon and the ground is 0.21
The normal force can be calculated by multiplying the mass of the object by the acceleration due to gravity (9.8 m/s²) and the cosine of the angle between the object and the surface it is resting on. This formula can be written as N = mgcosθ, where N is the normal force, m is the mass of the object, g is the acceleration due to gravity, and θ is the angle between the object and the surface.
Weight is the force exerted on an object by gravity, while normal force is the force exerted by a surface on an object in contact with it to prevent the object from falling through the surface. Weight is a vector quantity, while normal force is a scalar quantity. Additionally, weight always acts downwards, while normal force can act in any direction perpendicular to the surface.
No, the normal force cannot be negative. It always acts perpendicular to the surface and in the opposite direction of any external force applied to the object. Therefore, the normal force will always have a positive value.
When an object is pushed at an angle, the normal force will change depending on the angle between the object and the surface. The normal force will decrease as the angle increases, and it will become zero when the object is pushed parallel to the surface.
No, the normal force is not always equal to the weight of an object. The normal force is only equal to the weight when the object is at rest and there are no other forces acting on it. In other cases, such as when the object is accelerating or being pushed at an angle, the normal force will be different from the weight.