Complete sentence:
Mary concludes that the foam rubber balls’ acceleration during the collision was less than the steel balls’ acceleration. She concludes that the collision between the foam rubber balls is an inelastic collision.
Explanation:
Mary find that the force of impact on the steel ball is greater than the force on the foam rubber ball. According to Newton's second law, the acceleration of each ball is proportional to the force applied:
where F is the force applied and m is the mass of the ball. The two balls have same mass (1 kg), so since the force on the steel ball is greater, the acceleration of the steel ball is also greater.
The collision between the foam rubber balls is inelastic: it means that only the total momentum is conserved, while the total kinetic energy is not conserved.
Answer:
The torque in the coil is 4.9 × 10⁻⁵ N.m
Explanation:
T = NIABsinθ
Where;
T is the torque on the coil
N is the number of loops = 9
I is the current = 7.8 A
A is the area of the circular coil = ?
B is the Earth's magnetic field = 5.5 × 10⁻⁵ T
θ is the angle of inclination = 90 - 56 = 34°
Area of the circular coil is calculated as follows;
T = 9 × 7.8 × 0.0227 × 5.5×10⁻⁵ × sin34°
T = 4.9 × 10⁻⁵ N.m
Therefore, the torque in the coil is 4.9 × 10⁻⁵ N.m