HESI A2 test Physic - Newton's Law Of Motion

Which of the following statements describes Newton’s first law of motion?

An object continues to be in a state of rest or motion unless acted upon by an unbalanced external force.

Which of the following statements describes Newton’s second law of motion?

The acceleration of an object is directly proportional to the external force on the body.

“A boy jumps from the ground applying a force on the ground, at the same time the ground applies an upward force which is equal to the magnitude of the force applied by the boy. This is what propels the boy in the air.” Which of the following laws describe this phenomenon?

Newton’s third law of motion

Two people are pushing a box on the ground. One person applies a force of 146.5 N to the left, whereas the second person applies a force of 90.6 N to the right. What is the net force on the box, and in which direction is it moving? (Ignore the effects of friction)

55.9 N to the left

A box is lying on a table. Two forces of values 150 N and 235 N act on the box in the same direction (to the left). What is the resultant force on the box lying on the table? (Assume the table to be frictionless)

385 N to the left

Two opposing forces are acting upon a book. If the magnitude of both forces is 50 N, in which direction will the book move? And what is the value of the net force and on the book? (Assume the book is lying on a frictionless surface)

The book will not move, and F_net = 0 N

Two forces of magnitudes 136 N and 145 N act upon a box in the same direction. The box has a mass of 25 kg. What is the acceleration of the box? (Ignore the effects of friction)

11.24 m/s²

Two forces are acting upon an object of mass 50 kg. One of the forces has a magnitude of 234 N and is acting to the right. The other force has a magnitude of 546 N and is acting to the left. What is the acceleration of the object? (Ignore effects of friction)

6.24 m/s² to the left

A football of mass 450 g is lying on the ground. Two forces are acting on the football in opposing directions. If the magnitude of the two forces are 52 N and 63 N, what is the magnitude of the acceleration of the football? (Assume that there is no friction between the football and the ground)

24.44 m/s²

A box of mass 23 kg is lying on a table. Two forces of magnitudes 143 N and 356 N  are acting on the box in the same direction. What is the magnitude of the acceleration of the box as it starts moving? (Assume no friction exists between the box and table)

21.7 m/s²

A ball is acted upon by two forces of magnitudes 58 N and 67 N in the same direction. If the ball’s acceleration is 40 m/s², what is the mass of the ball?

3.13 Kg

An object accelerates 62 m/s² after being acted upon by two opposing forces of magnitudes 120 N to the left and 432 N to the right. What is the mass of the object? 

5.03 kg

A box is sliding on a table with an acceleration of 12 m/s² due to two forces of magnitudes 72 N and 89 N acting on the box in the same direction. What is the mass of the box? (Assume no friction exists between the box and table)

13.42 kg

Two forces of magnitudes 562 N and 721 N are acting to the right and left, respectively, on a bicycle. The bicycle moves with an acceleration of 21 m/s². What is the mass of the bicycle?

7.57 kg

An object of mass 25 kg is resting on a table. If the only force acting on it is the force of gravity, how much does it weigh?

245 N

What is the weight of a box of mass 85 kg?

833 N

A bird of mass 40 g is resting on the ground. What is its weight?

0.392 N

A refrigerator weighs 1300 N. What is its mass?

132.65 kg

A person weighs 650 N. What is the person’s mass? 

66.33 kg

What is the mass of a girl who weighs 856 N? (Take g=9.8 m/s²)

87.35 kg