subject

Dynamics

Physics ⇒ Mechanics

Dynamics starts at 10 and continues till grade 12. QuestionsToday has an evolving set of questions to continuously challenge students so that their knowledge grows in Dynamics. How you perform is determined by your score and the time you take. When you play a quiz, your answers are evaluated in concept instead of actual words and definitions used.
See sample questions for grade 11
A 10 kg box is pulled across a horizontal surface with a force of 50 N. If the frictional force is 20 N, what is the acceleration of the box?
A 2 kg object is acted upon by two forces: 10 N to the right and 4 N to the left. What is the acceleration of the object?
A 2 kg object is moving at 3 m/s. What is its momentum?
A 4 kg object is moving with a velocity of 5 m/s. What is its kinetic energy?
A 5 kg object is acted upon by a net force of 20 N. What is its acceleration?
A ball of mass 0.2 kg is dropped from a height. What is the force of gravity acting on it? (Take g = 9.8 m/s²)
A car of mass 1000 kg accelerates from rest to 20 m/s in 10 seconds. What is the average force applied?
A force of 15 N is applied to a 3 kg object. What is its acceleration?
Define net force.
Describe the difference between static and kinetic friction.
Friction can be both beneficial and harmful. Give one example of each.
State Newton's First Law of Motion.
State Newton's Third Law of Motion.
The acceleration due to gravity on the Moon is about 1.6 m/s². If an astronaut has a mass of 80 kg, what is his weight on the Moon?
A 0.5 kg ball moving at 8 m/s collides elastically with a stationary 1.5 kg ball. What are the velocities of both balls after the collision?
A 12 kg sled is pulled across a horizontal icy surface by a rope that makes an angle of 30° above the horizontal. If the tension in the rope is 40 N and the coefficient of kinetic friction between the sled and the ice is 0.05, calculate the acceleration of the sled. (Take g = 9.8 m/s²)
A 2 kg object is attached to a spring and oscillates horizontally with negligible friction. If the spring constant is 200 N/m and the object is pulled 0.1 m from equilibrium and released, what is the maximum force exerted by the spring on the object?
A 3 kg object is moving in a circle of radius 2 m at a constant speed of 4 m/s. What is the magnitude of the net force acting on the object?
A 60 kg astronaut in space throws a 2 kg tool away from herself at 3 m/s. What is the resulting velocity of the astronaut?
A block of mass 5 kg is placed on an inclined plane making an angle of 37° with the horizontal. If the coefficient of static friction is 0.4, will the block slide down the plane? Justify your answer with calculations. (Take g = 9.8 m/s²)